[[quoteright:260:[[Webcomic/RealLifeComics http://static.tvtropes.org/pmwiki/pub/images/stoppedtoeat.png]]]]
[[caption-width-right:263:[-"Oh yeah...that thing I need to do to not die."-] ]]

->''"Skinny people irritate me! Especially when they say things like "you know, sometimes I forget to eat!" Now, I've forgotten my address, my mother's maiden name, and my keys, but I have ''never'' forgotten to eat. You have to be a special kind of stupid to forget to eat."''
-->-- '''Marsha Warfield''', in one of her early stand-up routines

This trope describes a character who's notorious for ignoring their body's need for nutrition and has to be reminded to eat. They'll go out into the wilderness without food supplies, and will forget dinnertime at home because what they're doing is so much more interesting. This is the opposite of BigEater, especially if the character doesn't quite suffer all the ill effects of poor nutrition. Grief-stricken characters may show it for a period, particularly during DrowningMySorrows or a MessOfWoe.

The AbsentMindedProfessor may exhibit this trope, and it is a common component of TheMadnessPlace. It may also be a temporary effect of JustOneMoreLevel. Sometimes a result of HumanityEnsues, when before their transformation, they were a species that needed less food than a human being, or none at all.

This is TruthInTelevision, as {{workaholic}}s and others will become so engaged in something that they ''do'' forget to eat. UsefulNotes/IsaacNewton was famous for being so obsessive about his work that he would work hours and hours while neglecting to bathe or eat. Because this is common among obsessed gamers, AntiPoopSocking had to be put in place in many games. Science further backs this up, as the nervous system has the digestive system slow and close up if a person is under stress. Nobody wants to stop for a bathroom break or snack when being chased by a {{bear|sAreBadNews}}.

Contrast ObsessedWithFood.


[[folder:Anime and Manga]]
* ''Manga/BetrayalKnowsMyName'': Shuusei Usui.
* ''Manga/DragonHalf'': [[TheDitz Damaramu]] was so eager to follow the King's orders to hunt down Mink that he hadn't fed his [[LargeHam mighty stomach]] for [[RuleOfThree three days]]! He still has the strength to lift a boulder over his head and engage in a sword fight.
* ''Anime/{{Gankutsuou}}'': Episode 16 reveals that Franz has been going a few days without eating or sleeping much while researching stuff on Gankutsuou and the Count.
** Albert does this from time to time.
* ''LightNovel/TheGoodWitchOfTheWest'': Roux forgets to do this to the point of collapsing so Firiel brings him food.
* ''Anime/GunXSword'': Van regularly passes out from hunger because he's so preoccupied with catching the Claw.
* ''LightNovel/HaruhiSuzumiya'': In ''Disappearance'' human Yuki forgets to eat, and [[spoiler:her neighbor, Asakura Ryouko, has to feed her]].
* ''Manga/HidamariSketch'': Sae is like this when she gets into the groove of writing one of her novels. She eats a lot to make up for it afterwards, which doesn't sound healthy to Yuno, and Hiro agrees.
* ''Manga/JunjouRomantica'': Before Misaki moved in to his apartment, Usami used to spend days at a time not eating or sleeping whenever he was up against a deadline, sometimes to the point of collapsing on his living room floor.
* ''Manga/KatekyoHitmanReborn'': Both Spanner and Shuuichi Irie. They're so focused on their work that they tune out ''everything''.
* In [[Anime/MagicalGirlLyricalNanoha the first season]] of ''Franchise/LyricalNanoha'' it is shown that Fate was so single minded in her obsessing with capturing the Jewel Seeds that she even forgoes eating in order to search for more of them which naturally worries Arf. She gets better after her HeelFaceTurn.
* ''Manga/MagiLabyrinthOfMagic'': Prince Koumei, as foremost military [[TheStrategist strategist]] of the [[TheEmpire Kou Empire]], adviser to his [[TakeOverTheWorld power-hungry]] elder brother, and a consummate {{workaholic}}, doesn't even have time to ''sleep'', let alone eat. This was hammered home when his character profile revealed that he's rather underweight.
* ''Anime/MobileSuitGundam'': Amuro Ray is first seen tinkering in his bedroom, having forgotten to eat for a couple days and ignoring evacuation sirens. This is not the last time it happens.
* ''Manga/{{Monster}}'': Dr. Tenma has a tendency to do this often enough that even complete strangers start worrying about it. At one point, a restaurant owner gave him free soup and refused to let him leave unless he finished it. Not too much later, his stomach decides that it doesn't like this strange and scary concept known as "food", and he throws up.
** Granted, he threw up because the thought of [[ActualPacifist actually]] [[ShootTheDog going through with killing Johan]] made him feel sick.
* ''Manga/{{Naruto}}'': In the earlier chapters, Naruto begins training from early morning way into the night so he usually doesn't have time to eat. Sasuke has to keep reminding him to eat.
* ''Manga/NodameCantabile'': Nodame sometimes compulsively needs to play the piano and neglects everything (taking a shower, sleeping, eating) in order to do it, despite being a BigEater.
* ''Manga/OnePiece'': Given he's had to be reminded to speak out loud, blink his eyes, and ''breathe'', this certainly has happened to Gedatz.
** Inverted when it comes to Luffy. He's able to both eat in his sleep and instantly calculate how many meals he's missed as a result of sleeping for more than a day.
* ''Anime/ReadOrDie'': This is one of the reasons why {{Paper Master}}s are BlessedWithSuck; the [[ElementalPowers power to manipulate paper]] comes hand in hand with such extreme bibliophilia that they often neglect basic bodily concerns and hygiene because they always have to read ''just one more chapter'' of the latest book to catch their eye.
* ''Manga/SkipBeat'': Ren tends to do this. JustifiedTrope since he was often force-fed as a child by his [[MyBelovedSmother Beloved Smother]] to the point that ''he was unable to breathe'', and has since slid into this because he's a workaholic.
* ''LightNovel/{{Slayers}} Try'': Lina and the group decide to immediately set sail for adventure... only to remember later, after they're stranded at sea, that they forgot to bring food. Cue them pretending to be dead so they can catch [[DogFoodDiet seagulls]].
* ''Manga/SnowWhiteAndSevenDwarfs'': In the epilogue, Fujimaru, having become a {{Workaholic}} (which, in turns, stems from him being TheAtoner), isn't above neglecting meals to focus on repairing Tokyo instead. Ken has to outright tell him that he won't be helping anyone by wrecking his health.
* ''Anime/WelcomeToTheNHK'': Satou does this when he get addicted to [[RPGEpisode an]] [[DeepImmersionGaming MMO]]. Though it's not specifically mentioned, given Satou's history it also probably happens when he spends days on end playing [[HGame H-Games]] and [[TheInternetIsForPorn downloading "120 gigs of dirty photos"]].
* ''Manga/{{X1999}}'': Subaru Sumeragi did this [[Manga/TokyoBabylon when he was younger]], according to his sister.

* Franchise/{{Batman}}, much to Alfred's despair.
* ''ComicBook/IronMan'': Tony Stark, whenever he's in his lab. Occasionally, people have had to ''argue'' with him in order to get him to come out and eat something--not actually because he's being a jerk, but because he's in the middle of something, and seriously, just give him a bit longer, five more minutes, he just wants to get this part finished [[BlatantLies and then he'll come right up, he swears]].
* Despite Susan Richards' best efforts, Reed Richards of the ComicBook/FantasticFour isn't much better.
* After being brought back to life in ''ComicBook/BlackestNight'', Boston Brand, the former Deadman, has to be reminded by his ''power ring'' to ''eat a cheeseburger'' in ''ComicBook/BrightestDay''. Being dead for so long made Brand forget that he actually needs to eat again.

* Sunny Breeze of ''FanFic/RacerAndTheGeek'' seldom eats, but never fails to take [[QuickNip swigs of spirits]]. It's a subtle hint, given even in [[http://www.fimfiction.net/story/81159/1/racer-and-the-geek/predawn the first chapter]], that not all is well with him.
* In the ''WesternAnimation/{{Megamind}}'' fic ''Aftermath'', Minion remarks that his boss "keeps forgetting that the big brain of his comes with a life support system that needs nourishment from time to time", which helps explain Megamind's frail and lanky physique.
* In scifigrl47's ''Fanfic/{{TheToasterverse}}'', Tony has to constantly be reminded that he needs to eat. Lampshaded by himself in Some Things Shouldn't Be A Chore.

* The fictionalized version of John Nash in ''Film/ABeautifulMind''. After some CharacterDevelopment, he asks a student how long it's been since he's eaten.
* Mr. Beefy has to remind the titular character of ''Film/LittleNicky'' to eat and "do that sleep thing [he] told [him] about". Thoroughly justified since Nicky is a demon[[spoiler:/angel hybrid]] from Hell that hasn't had to do either until now.

* Literature/HarryPotter tends to do this during meal time at Hogwarts as a result of anxiety and chaotic thoughts.
* Jame in ''Literature/ChroniclesOfTheKencyrath'' never remembers to eat, and is [[NothingButSkinAndBones skinny as a rail with ribs showing]]. Justified in that the [[AlienLunch mutant vegetables]] she had to eat growing up would put anyone off food.
* Literature/SherlockHolmes occasionally gets so wrapped up in a case that he doesn't bother to stop for food. That's when he isn't straight-up starving himself on purpose because he believes it will enhance his powers of concentration. Watson complains that he sometimes deprives himself to the point of literally passing out from hunger.
* Astrophysicist Jacob Buckman in ''Literature/TheMoteInGodsEye''. He meets Horace Bury in a ship's corridor. Horace wonders privately what an autopsy at that moment on Buckman would show as cause of death... exhaustion or malnutrition?
* In the ''Series/DoctorWho'' ''Literature/EighthDoctorAdventures'', the Doctor has a bit of a habit of this. Mostly when he's {{angst}}ing, but also when he's [[ForScience doing science]]. His companion Fitz once brought three meals a day to his door when he was locked away angsting. For four days. They all went uneaten. Somewhat justified by the fact that, as a Time Lord, he apparently needs to eat less than a normal human being. Also, judging by the descriptions of him in the books, he's lost weight since his sole TV appearance. In one book, while he's already under the weather for several other reasons, his companion Anji has to remind him to eat:
-->"Do you want some food? You haven't eaten in days."\\
"That's right," he said wonderingly, as if she'd made a point that hadn't occurred to him. "You know, I bet that's one reason I feel so bad."
* A MadScientist and Asperger-type autistic in the Creator/RobertLudlum novel ''The Sigma Protocol'', who has only two modes: on his meds, he remembers to eat and sleep. Off his meds, he concocts insanely brilliant schemes and invents wacky contraptions. (There are currently no medications for autism with that side effect, but just roll with it. Sounds closer to the side effects of medication to treat bipolar disorder.)
* Happens to Vanyel Ashkevron in the ''[[Literature/HeraldsOfValdemar Last Herald Mage]]'' trilogy when he's on the front lines. His friends and family are stricken by how thin he looks when he returns, and clothes don't fit him well; his replies to questions about it lampshade this trope.
* In Creator/JackVance's ''Literature/PlanetOfAdventure'' series, Adam Reith at one point realizes that the reason everybody else is so cranky and tired is that they haven't eaten in two days, and by extension, neither has he.
* In ''Literature/ASongOfIceAndFire'', Melisandre often forgets to eat because she doesn't need to. But that freaks people out, so she tries to remember.
* Colin from ''Literature/AnAbundanceOfKatherines'' doesn't think much of eating.
* In Creator/PoulAnderson's ''Literature/AMidsummerTempest'', Rupert stops eating when his magical ring loses its powers through his fault. Will brings him a meal and plops it in front of him and tells him, at great length, that he should eat.
* Ana from ''Literature/FiftyShadesOfGrey'' is known for this, and it infuriates Christian whenever he finds out that she hasn't been eating proper meals lately.
* Bertram of ''Literature/{{Dinoverse}}'' alternately claims this, that he's not hungry, and that eating would take too much time when first put in the body of an ankylosaurus. It's really because he knows he'll have [[{{Gasshole}} horrific gas]].
* The eponymous protagonist of the ''Literature/HoratioHornblower'' is prone to this. More than once he carries out a protracted action with enemy ships (or some other problem requiring physical and mental exertion) and only realizes at sunset that he only had breakfast. Bush, his NumberTwo, tries to prevent this when possible.
* ''Literature/TheSlowRegardOfSilentThings'': Every once and a while, Auri will suddenly feel lightheaded and wonder what's wrong with her. Then she'll realize that she hasn't eaten anything in more than a day.
* ''Literature/{{Dracula}}'': One of the worrying symptoms Helsing notes of Mina after she's bitten by Dracula, due to the fact her appetite has suddenly disappered during the journey to Castle Dracula. A sign that she's becoming closer to turning into a vampire.

[[folder:Live-Action TV]]
* Jack Bauer in ''Series/TwentyFour''.
** So he goes without food for one day in each year? Big deal.
** Possibly justified in that if he had to eat he'd probably have to poop at some point too. And Jack Bauer does not poop.
* In ''Series/StargateSG1'', a recurring theme with Samantha Carter was her obsession with work and lack of social life outside of the job. While she was never shown to forget to eat, she was on numerous occasions shown to otherwise forget to ''stop working''.
** In "The Other Side", O'Neill arrives in the SGC control room to find Carter there. He says that ''he'' is there two hours early, and asks how long she's been here. She says she never actually left the previous day.
-->'''O'Neill''': "Didn't I ''order'' you to get a life?"
** In "Arthur's Mantle", Sam has worked all night and Cam comes in to take her to breakfast. He practically has to drag her away as she insists on running one more test. That experiment then puts them out of phase, so they can't eat anyway.
* A [[PlayingWIthATrope variation]] with Rodney [=McKay=] on ''Series/StargateAtlantis''. Rodney is actually a BigEater and would never forget a meal or voluntarily choose to skip one (A RunningGag throughout the series was the way he would eat at inopportune moments or bring up a fear of starvation at the slightest delay of a meal), but at several points in the show the situation is so dire that he literally does not have the time to stop working long enough to eat or sleep; death (For him and others) would result if he did. He grows continuously more abrasive as the time wears on, with other characters asking him how long it has been.
* Spock from ''Series/{{Star Trek|The Original Series}}'', occasionally. While never shown, in "Amok Time", [=McCoy=] uses the fact that Spock hasn't eaten for three days in an attempt to convince Kirk that something is wrong, and Kirk dismisses it as simply being Spock in one of his contemplative phases.
** Another example is "The Paradise Syndrome", where Spock hardly eats for weeks while studying the obelisk.
* This happened to Gil Grissom of ''Series/{{CSI}}'' once. He spent so much time at a crime scene that one of his co-workers had to rummage something from the fridge at the scene just to get him to eat.
* ''Series/CriminalMinds'':
** Averted with Reid, the most likely candidate for "absent-minded professor", who never seems to ''stop'' eating, especially when he's thinking. If there's [[GeniusSweetTooth junk food]] to be had anywhere in an unfamiliar police station, abandoned house, or crime scene, he will find it. [[GeekPhysiques Although where he puts it all is anybody's guess]].
** Discussed by Reid about his schizophrenic mom.
--->'''Reid''': My mother is a paranoid schizophrenic who'd forget to eat if she wasn't properly medicated and supervised.
* As per his [[Literature/SherlockHolmes literary counterpart]], the [[Series/{{Sherlock}} BBC version of Sherlock]] often goes without eating while on cases. On one occasion, he refuses a meal because "digestion slows [him] down". It's a sign of [[TheWatson John]]'s positive influence that, during the second series, Sherlock can be seen eating proper meals and snacking between the action.
* Another Sherlock, from ''Series/{{Elementary}}'', not only forgets to eat, but also sleep, shower, and generally take care of himself, and is a recovering drug addict. After spending most of an episode with little to no sleep he starts to protest to [[CloudcuckoolandersMinder Joan]] that he's feeling great and can keep going, only to fall dead asleep as soon as her back is turned.
* One of the side effects of the muse shell in ''Series/WizardsOfWaverlyPlace'', as demonstrated when Alex uses it on Mason.
* In ''Series/LostGirl'', Lauren is implied to do this. In the season two premiere, she apparently hasn't eaten or slept much since the season 1 finale, being too focused on keeping her patients alive. She later shows up at Bo's to help with the current case, only for Bo to cut her off and demand that she eat something. Then her exhaustion finally catches up her, and she falls asleep.
** Later in season two, Lauren has been working nonstop to stabilize some venom, and Bo asks her point-blank when the last time she slept was.
* According to Jamie, Adam of the ''Series/MythBusters'' will often forget to eat, which makes him cranky from low blood sugar. So when they had a spat during the Ping-Pong Ball Ship Recovery myth and Jamie told him to "go have a cookie" that wasn't a joke, he actually wanted him to go eat something.
* In the ''Series/{{Scorpion}}'' episode "Plutonium Is Forever", it's heavily implied that this is normal for the members of Team Scorpion when they get so focused on something that nothing else (food, sleep...) matters. They call it "going down the rabbit hole".

[[folder:Video Games]]
* Both Erk and his mentor Lord Pent in ''Franchise/FireEmblem 7'' have done this, the former actually passing out from both this and a lack of sleep at one point in the past (which ''really'' displeases his adoptive mother and Pent's wife, Lady Louise). Lord Athos does this as well, though his case is justified in that he's over a thousand years old and "surpassed the needs of flesh".
* Shapers in ''VideoGame/{{Geneforge}}'' have been known to focus on their research so much they forget to eat, sleep, and bathe.
* ''VideoGame/RuneFactory'':
** Selphie in ''VideoGame/RuneFactoryFrontier''. She's [[{{Bookworm}} an avid book-lover]] who often ForgetsToEat, and one way to reliably increase her [[RelationshipValues Affection Points]] is to give her foods she can eat on the go with a single hand, like sandwiches and rice balls.
** Gaius in ''VideoGame/RuneFactory3'' forgets to eat or sleep when he's working at the forge. Raven mentions at one point that, when she went to him for a job, he'd been working for ''six days straight'' and was close to collapsing.
** Arthur in ''VideoGame/RuneFactory4'' will often do this if Porcoline doesn't remind him.
* ''VideoGame/MetalGearSolid3'': While he doesn't exactly forget to eat, way too many people feel the need to remind Big Boss of eating through the course of the game.
* ''VideoGame/BaldursGate 2'' [[LampshadeHanging lampshades]] this in one of its loading screen tips: "While your character does not have to eat, remember that ''you'' do. We don't want to lose any dedicated players."
* Dr. Asmodeus of ''Website/{{Subeta}}'' attributes his svelteness to this.
** Not so much in the manga adaptation, the pace of which allows time for Sora to get some food. Granted it's not all that much, but it's at least something.
* ''VideoGame/PokemonGoldAndSilver'''s Professor Elm. His wife mentions that he is so busy with Pokémon research all the time that he forgets to eat.
* In ''VideoGame/TalesOfTheAbyss'', there's a skit indicating that Guy is victim to this--he knows how to cook because he misses mealtimes when he's working on [[{{Magitek}} fontech]], so he has to make his own food.
** Due to Jade's canonical tendency to hyperfocus when he's working on a project, many fanworks apply this trope to him, as well.
* Fujiwara no Mokou of ''VideoGame/{{Touhou}}'' frequently neglects to eat. She's [[CompleteImmortality incapable of dying]] so theoretically she could go forever without food, but eventually the hunger becomes enough of a pain that she eats something.
* Weird Ed, in ''VideoGame/ManiacMansion'', at one point mentions that he hasn't seen Dr. Fred eat ''in 5 years''. WordOfGod says it was to invoke this trope, but since Ed immediately mentions that Fred has been dragging bodies into the basement, many players (and Nintendo of America, in their infamous censorship process) thought that Ed was accusing Fred of cannibalism. The NES version was thus changed to Ed saying Fred hadn't ''slept'' in 5 years, instead.
** Which amusingly is made canon in ''VideoGame/DayOfTheTentacle'', where it is revealed that Doctor Fred has gone without sleep for years by means of imbibing massive quantities of coffee. One puzzle requires you to get him to fall asleep.
* By the third act of ''VideoGame/DragonAgeII'', Merrill has become so focused on fixing her MagicMirror that she barely leaves her house except to buy food. She does ''that'' so infrequently that Varric has parcels delivered to her doorstep.
* According to his troops, Mitsunari Ishida from ''VideoGame/SengokuBasara'' forgets to eat or sleep, since his life [[RevengeBeforeReason is so consumed by his desire to kill Ieyasu]]. Which might explain his LeanAndMean physique.
* ''VideoGame/DiabloIII'': Having [[HumanityEnsues become mortal]], Tyrael has a tendency to forget the need for food, since he's never had to deal with it before. In one case he decides to eat all the food he'll need for the day, and gets an upset stomach from eating ''too much''.
* As a sign of just how desperate the Luminoth were during their war with the Ing prior to the events of ''VideoGame/MetroidPrime2Echoes'', you come across the emaciated corpse of a deceased Luminoth warrior; scans reveal that said warrior refused to abandon her post despite the fact that she was starving to death.
* Not only does Yusuke from ''VideoGame/Persona5'' forget to eat due to hyperfocusing on his art projects, he mentions this fact in Mementos because he hears his stomach rumbling, ''suddenly remembers that he's incredibly hungry'' and that it's probably because he didn't eat the previous evening ([[FridgeHorror considering that you take everyone to Mementos after school...]]). This trope is just one of many reasons why Yusuke appears to have issues with eating consistently, with the other major one being his [[StarvingArtist limited budget]].

[[folder:Visual Novels]]
* Rin Tezuka, from ''VisualNovel/KatawaShoujo'', often forgets to eat if not reminded by either Hisao or Emi. When Emi suggests that she'll just vanish if she does not eat more often, Rin thinks this is an acceptable turn of events.
* [[DitzyGenius Amane]] in ''VisualNovel/IfMyHeartHadWings'' gets so wrapped up in her work that she frequently forgets to eat for days at a time. To give an example, she has claimed to have gone 70 hours without eating.
* In [[http://danbooru.donmai.us/posts/1479335?tags=fukawa_touko this]] sheet showing the characters of ''VisualNovel/DanganRonpa'' and ''VisualNovel/SuperDanganRonpa2'', Chiaki Nanami, who is shown on the lower end of the female BMI spectrum (a bit above the bottom-right corner), says "When playing games, I sometimes forget to eat... I think." [[spoiler:Since she's an ArtificialIntelligence, she may not even need to eat]].
** In her free time events, Chiaki mentions that she sometimes forgets to ''[[ExaggeratedTrope breathe]]''.
* Takashi in ''VisualNovel/ScandalInTheSpotlight'' is the composer of all of Revance's music, and when he's composing, nothing else matters, especially not stopping for food. He tends to crash hard when he's finished, and the other guys know to make sure time is set aside for him to rest and recover.

[[folder:Web Comics]]
* ''Webcomic/TheAdventuresOfDrMcNinja'', [[http://drmcninja.com/archives/comic/5p31/ as seen here]].
-->'''Dr. [=McNinja=]''': ''[holds swords crossed at {{Ninja}} {{Mook}}'s throat]'' I just realized I haven't eaten anything in like...two days. I ''just'' realized it!\\
'''Ninja Mook''': ''[nervously]'' Ha ha ha, yeah? That's pretty funny?...\\
'''Dr. [=McNinja=]''': ''[violently beheads mook]'' NO IT'S NOT. ''I'M HUNGRY!!''\\
'''AltText''': [And cranky too.]
* Roast Beef of ''Webcomic/{{Achewood}}'' does this sometimes. In one strip he mentions that he "didn't remember to eat for like nine days" after he had a fight with his girlfriend and she was no longer around to remind him.
* The page picture and its caption come from [[http://www.reallifecomics.com/comic.php?comic=title-589 the 2001-12-20 strip]] of ''[[Webcomic/RealLifeComics Real Life]]'' [[JustOneMoreLevel immediately after Greg got a copy of a new game]] (''VideoGame/FinalFantasyX'').
* In ''Webcomic/MonsieurCharlatan'', [[http://monsieur-charlatan.com/archive/page-5/ Isidore, accused of not feeding the cat, says it eats better than he does, because of neighbors]].
* ''WebComic/CherrysCure'': The main character never mentions herself eating, and is known to avoid sleep, as it wastes time.
* In the webcomic ''Webcomic/CardboardCrack'', the characters often forget to eat or [[http://cardboard-crack.com/post/64925327872/i-play-too-much-magic lose track of time]] due to playing too much ''TabletopGame/MagicTheGathering''.

[[folder:Web Original]]
* Pointedly, nobody in the [[MadScientist Ed stories]] on Website/{{Everything2}}.
-->'''Sam''': My mate Ed has been working on a new project for the last week or so. He hasn't done the classic "never comes out for food or sleep" routine, because, unlike all those other scientists in the movies, he isn't an ''idiot''.
* Well, not exactly forgets... the Porcelain Doctor from Literature/DeadWest. Combination of disgusting hallucinations and his medicatin's side effects tends to conclude in this. He actually suffers consequences, getting weaker and weaker, and he was underweight to begin with. Everybody near him tries to make him eat, but they are rarely successful (except Thomas).
* Yahtzee from ''WebAnimation/ZeroPunctuation'' apparently suffers from this trope. From his ''VideoGame/CallOfDuty 4'' review:
-->"There are two types of games: games that I've stopped playing because I'm bored or frustrated into a state approaching rigor mortis, and games that I've stopped playing because I've just noticed I should've had dinner two hours ago."
* ''WebOriginal/OrionsArm'': This was a problem with early concentration enhancements for Homo Superiors.
* This is a common condition for [[MadScientist devisors and gadgeteers]] in the Literature/WhateleyUniverse, to the point where the cafeteria even has "Devisor Specials", finger food packed up for someone to bring them.
* In one ''Webcomic/{{xkcd}}'', an [[https://www.xkcd.com/1708/ argument]] over the "low-grade dehydration" thing and how much water you should drink to avoid it results in Megan deciding to read every single study on the subject to determine if it's even real, during which she ironically forgets to eat or drink anything at all.

[[folder:Western Animation]]
* ''WesternAnimation/SpongeBobSquarePants'': Patrick once actually forgot how to eat. When he asks [=SpongeBob=] for help regarding his parents visiting, [=SpongeBob=] assumes he forgot how to eat again and is about to go get a funnel. When Patrick says that it's something worse, [=SpongeBob=] laments, "Darn, I liked the funnel."
* In the ''WesternAnimation/{{Metalocalypse}}'' episode "Tributeklok", the guys forget to eat [[TooDumbToLive because they don't have the Klokateers around to ring bells for them]].
* Jack Skellington from ''WesternAnimation/TheNightmareBeforeChristmas'' seem to be this (Sally brings him a food basket, so this is probably an usual occurrence). What is quite unusual is the fact that he ''needs'' to eat, since he's DemBones.
* [[AbsentMindedProfessor Professor Isaac Sumdac]] in ''WesternAnimation/TransformersAnimated'' tends to lose track of time whenever he holes himself up in his lab.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' episode "The Ticket Master", Twilight is continually hungry because her friends' persistent attempts to win her favor (and the Gala ticket) gets in the way of finding something to eat. She deliberately turns down Applejack's sumptuous buffet simply because it would be seen as favoring her over the others.

[[folder:Real Life]]
* Definitely a TruthInTelevision, just ask any long-time gamer.
** In some places, mostly South Korea and China, there's been an epidemic of gamers dropping dead at their computers from heart failure induced by malnutrition and overuse of energy drinks. Because of this, there has been legislation proposed to limit the amount of time internet cafés are accessible, and to force online game hosting services to restrict the amount of time players can connect.
* Brilliant scientists are noted for this:
** Archimedes would forget to eat, bathe, or sleep when thinking something out. Handlers were assigned to him to make sure he didn't starve himself to death. His death reportedly happened when the city he was residing in fell and he was deep in thought. When the soldiers came to capture him, he paid them no mind and continued on the problem at hand. One of the soldiers lost his temper at being ignored and ran him through.
-->"Do not disturb my circles!"
** Allegedly-historical anecdote: Isaac Newton's servant came into his rooms to find him engrossed in an experiment, the lunch tray covered on the table.
--->'''Servant''': Have you had lunch?\\
'''Newton''': I don't know, have I?
*** Another anecdote tells of one of his friends coming over for dinner to find Newton seated at the table deep in thought. Newton's servants, being used to this, proceeded to serve the dinner and Newton didn't snap out of it until the brandy and cigars, whereupon he declared he was sure he hadn't eaten yet, but since the evidence was right in front of him...
** Marie Curie was a real-life StarvingStudent, literally living in a garret in the Latin Quarter while attending the Sorbonne. She had twenty-hour days and a food budget in the single digits, and would often Forget To Eat the little she had. She passed out at least once at school (between classes, not during a lecture as in the movie). Her sister and brother-in-law, both doctors, had her live in their home so she'd have a steady source of real food and someone to remind her to eat it. However, their place was too far away from school and she subsequently moved back to her garret, beginning the cycle all over again. A few years later she married Pierre Curie, a classic AbsentmindedProfessor with similar issues.
** Albert Einstein had stomachaches that no doctor could cure until they found the reason: sometimes he was so preoccupied with scientific work that he simply forgot to eat.
** J. Robert Oppenheimer was known to forget to eat when deep in thought and concentration.
* Bill Gates, when Microsoft was young, anyway.
** This probably applies to computer programmers just as much as gamers, if not more.
* Sometimes, when asked if they're hungry, people who rely on very rigid schedules will respond by asking what time it is rather than considering how hungry they are.
** In a more extreme version, you'll be hungry at school at whatever period you normally have lunch, even if it's a minimum day and lunchtime isn't for hours.
* Creator/MontyPython member Eric Idle claims to do this. His "Greedy Bastard Diary", a daily blog in book form of a tour he did, records one instance where he only remembered when his vision started getting dark and blurry around the edges.
* A good amount of ADHD/ADD medications are stimulants, often based on methamphetamine. These suppress a person's appetite, so much so that they used to be used as diet pills. When you plain don't get hungry, and have a tendency to lose track of time, this tends to happen. This example is actually an [[InvokedTrope invocation]] of this trope, as the neurotransmitter that mediates alertness and concentration ''also'' suppresses appetite; by invoking hyperfocus, one ForgetsToEat. And since hyperfocus ''also'' happens when someone with ADHD finds something particularly interesting, this can happen without medication being involved as well.
* Unfortunately, this can be one of the symptoms of depression. When your world seems to be falling apart around you, details like sustenance become unimportant.
** Equally unfortunately, individuals who suffer from Social Anxiety or other anxiety disorders tend to shy away from going near the lunch room or cafeteria, let alone ordering something. Thankfully there are alternatives (study classes during lunch at school, your office at work) but in some cases this can be a case of Too Scared to Eat instead of Forgets to Eat.
* It can also be a symptom of schizophrenia, severe anxiety and PTSD, as those with severe negative symptoms will begin to "decompensate" -- lose their ability to take care of themselves.
** And those with paranoia, either as a result of schizophrenia or other disorders, may refuse food on the grounds that someone has poisoned it. This is how mathematician Kurt Godel died, since he would only eat meals prepared by his wife. When she was hospitalized for an extended period...
* One of the major drawbacks of eating disorders such as anorexia is this trope.
* College or graduate students under stress (during finals, for example) fall victim to this trope. Sometimes that "A" in English eclipses whatever the cafeteria is serving. Goes double if what the cafeteria is serving is unrecognizable or unappetizing.
** But they'll ''never'' forget to [[MustHaveCaffeine drink coffee]].
* Writers fall victim to this. Frequently they get hyperfocused on what they're writing so they don't lose their train of thought, and when they finish that particular article, page, chapter, etc., they'll come back to reality and suddenly notice, "Huh, I'm starving."
** Also true for artists when working on pieces for hours. Gives a new meaning to the term "starving artist".
* Some diets (for example, most low-glycemic diets that aim to control spikes and drops in blood sugar) require a person to eat five or six small meals a day, which typically means eating a small amount of food every two or three hours. Those who have grown accustomed to eating two or three large meals in a day will often forget the smaller meals, needing time to develop new habits.
* Oftentimes, victims of child abuse will fall into this trope, whether they were malnourished as punishment, had unnecessary medications slipped into their meals, have PTSD, or because they've had such extensive mental and emotional abuse that they lack interest in eating due to feeling they aren't worthy of food.
* It is notable that fierce hunger pangs can be confused for extreme nausea, especially under times of stress or sickness. This makes the idea of eating quite unappealing, even if you've gone for days without a real meal. The best solution to this, incidentally, is drinking something with sugar in it, preferably fruit juice, until your blood sugar level rises enough that you're merely hungry again. Be sure to eat some protein (eggs or fish are recommended) along with it.
* The poet Percy Shelley fell victim to this, as evidenced by this conversation in Trelawny's ''Recollections'':
-->'''Trelawny''': Cheer up, my lad, and come to dinner.\\
'''Shelley''': You go, I have dined–late eating don't do for me.\\
'''Trelawny''': ''[picks up plate of food]'' What is this?\\
'''Shelley''': That--why, that must be my dinner...I thought I had eaten it.\\
'''Trelawny''': ''[drags Shelley into dining room]''
* Falling ill can cause a person to forget about eating due to the symptoms that they're suffering from overtakes their need to eat.
* Alcoholics tend to spend more time drinking than eating, and consequently many of them are malnourished. Longtime alcoholics also tend to suffer from chronic pancreatitis, making eating painful.
* Amphetamines have a hunger-suppressing effect, causing users to either not realize how hungry they are or feel outright repulsed by the thought of food while under its influence. Speed users are stereotypically depicted as wire-thin due to a combination of not eating too much and above-average physical exertion they are capable of. This also ties into the above point about ADHD medications causing this effect, as some of the more common ones, particularly Adderall, fall under the Amphetamine category.
* Autistic people often forget to eat, either due to sensory problems -- not being able to tell when they are hungry -- or for similar reasons as the above entry on ADHD hyperfocus. Some only remember to eat if it's in their routine for the day.
* Experiments where rats are taught to press a lever to get food, and another for a pleasurable electric shock tend to result in the rats starving... they are so obsessed with pleasure, they don't bother to push the food lever.
[[TVTropesWillRuinYourLife You've been on this site for]] ''[[TVTropesWillRuinYourLife how]]'' [[TVTropesWillRuinYourLife long]]? [[ThisLoserIsYou Hey you]], go eat some food!