[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/looksharp.jpg]]
[[caption-width-right:350:[-Advice for spies. And many others-] ]]

->''"It is sometimes the height of wisdom to feign stupidity."''
-->-- '''Cato the Elder'''

Also sometimes known as "playing dumb", a tactic whose effectiveness is predicated on characters convincing others they are complete oafs and therefore harmless. Acting like an ignorant hayseed, misinformed tourist, HandsomeLech or a FunnyForeigner is popular.

A variant of this, primarily found in teen comedies, is the popular student ([[UnfortunateImplications almost invariably a girl]]) who acts like TheDitz in order to avoid being stigmatized as a {{nerd}}; in such cases, the character may be wilfully ignorant, but inevitably faces a situation where she needs her native wits to escape a problem.

This differs from the GeniusDitz in that the latter is brilliant in a single field (or multiple obscure fields) but genuinely ditzy otherwise. Another variant is of someone who is a genuine genius but who pretends to be TheFool in order to avoid responsibility, either because [[BrilliantButLazy they are lazy]] or because of some trauma which has undermined their confidence. May appear to be TheFool until the viewer realizes he's just so good at making intentional actions seem like total coincidences that it appears to be blind luck. If done well, you may not be able to tell if the character is an AlmightyJanitor, a CrouchingMoronHiddenBadass or a BunnyEarsLawyer. Or, for that matter, TooDumbToFool, especially if the character is good at noticing what is too obvious to be seen.

A favorite tactic of TheTrickster. The opposite trope is FeigningIntelligence. See also the OldMaster, to whom using this trope comes as natural as breathing; CovertPervert, where the "stupidity" may be in reference to a particular subject; and RichIdiotWithNoDayJob, a special case of this trope. See also {{Fauxreigner}} and BilingualBackfire. Compare ObfuscatingInsanity. Blondes may exploit the DumbBlonde stereotype to help with the obfuscation. A GoodIsNotDumb character is often accused of using this trope.

This can backfire in a big way if the person using ObfuscatingStupidity needs people to trust him or her -- only to realize that no one will believe the "idiot". Inversely, if other characters ''think'' the person is being obfuscating but he really is simple-minded, then he's a SeeminglyProfoundFool.

This is OlderThanFeudalism, occurring in [[Literature/TheBible the Book of Genesis]] and in legends of the earliest days of Rome.

See also BeneathTheMask, FakingAmnesia, ObfuscatingDisability & PlayingSick.

Administrivia/NoRealLifeExamplesPlease
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!!Examples:
[[index]]
* ObfuscatingStupidity/AnimeAndManga
* ObfuscatingStupidity/{{Comics}}
* ObfuscatingStupidity/{{Fanworks}}
* ObfuscatingStupidity/{{Film}}
* ObfuscatingStupidity/{{Literature}}
* ObfuscatingStupidity/LiveActionTV
* ObfuscatingStupidity/{{Theatre}}
* ObfuscatingStupidity/VideoGames
* ObfuscatingStupidity/{{Webcomics}}
* ObfuscatingStupidity/WesternAnimation

[[/index]]
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[[folder:Folklore]]
* Folk legends of various European peoples speak of [[UpToEleven entire towns and villages]] of unusually smart folks who purposefully feign stupidity. [[http://en.wikipedia.org/wiki/Wise_Men_of_Gotham This article]] on the OtherWiki sums it up pretty well.
* The story of ''{{Hamlet}}'' is based on the legend of the Danish Prince Amled, whose father was murdered by his EvilUncle Fenge. Amled took to sitting near the fire and carving wooden hooks all day, telling everyone that he would use them to avenge his father. Fenge thought he was crazy - until the night where Amled used the hooks to pin down Fenge and his men under their sleeping blankets and burn down the palace over their heads before they could get free.
** A female version of the legend has a man kill his tribe's chief and take his place, shortly before lusting after the former chief's daughter. Said daughter knew full well who murdered her father, but pretended to not know anything. Then the murderer asked her to meet him in his tent one night, and she brought a knife with her... And cut some bread?
* According to his legend, [[http://en.wikipedia.org/wiki/Simeon_the_Holy_Fool Saint Simeon the Holy Fool.]] He was a simple ascetic monk whom God himself asked to act like a madman so he could save souls, and lo did he make honor to that.
* One old story tells about a guy who owned someone else a big amount of money and would be thrown into debtors' prison if he couldn't pay. However, he found an AmoralAttorney who promised him to bail him out for four gold pieces, to be paid after a successful acquitting. So the lawyer advises his client: "When in court, say nothing but 'bleh!', whatever happens!" The process starts, and the client indeed answers nothing but "Bleh!" no matter what he's asked. Finally the judge has enough:
--> Judge: "Why does your client say nothing but 'bleh!'?"
--> AmoralAttorney: "I'm sorry your honor, he's an idiot, when I was talking to him, he also said nothing but that!"
** So the judge comes to the conclusion that the defendant can't be condemned and lets him go. Now the AmoralAttorney demands his money. But the client, again, just says "Bleh!"
--> AmoralAttorney: "Are you joking? You promised me four gold pieces! I want them now!"
--> Client (tips on the table): "Bleh, bleh, bleh, bleh!"
** Now that's a lawyer HoistByHisOwnPetard...
* The 16th-century Teutonic legend of the Schildbürgers says they were great sages who went far and wide to advise princes -- until their wives got sick of them going far and wide and they needed to get the princes to stop seeking their advice.
* According to legend, the Roman Lucius Junius feigned stupidity (earning the name "Brutus", Latin for "dullard") to avoid being killed by the evil king Tarquin. When the time came, Brutus dropped the mask and led the overthrow of the monarchy, establishing the Roman Republic. (Centuries later, his descendant Marcus Junius Brutus followed his ancestor's example by participating in the assassination of Julius Caesar.)
* Creator/{{Socrates}} was so good at this, they had him killed.
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[[folder:Jokes]]
* One joke recounts the tale of a kindly shopkeeper and a little kid named Billy. On many an occasion, the shopkeeper would witness older boys teasing Billy by offering him a choice between a nickel and a dime, then laughing at him choosing the nickel, supposedly because the nickel was larger and Billy was too slow to realise that the dime was worth more. Eventually, the shopkeeper took pity on Billy, and took him aside for a quiet word on the matter... only for Billy to reveal that he was playing this trope all along: he knows very well how much the two coins are worth, but if he ever picks the dime, the kids will stop giving him free nickels.
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[[folder:Music]]
* The fact that TheAmateurTransplants often affect a stage persona reminiscent of ignorant chavs just makes it all the more impressive and hilarious when they rattle off [[TheLongList lengthy amounts of obscure medical terms]] in their songs.
* Shy Ronnie from the two songs by ''Music/TheLonelyIsland'' featuring him. When his partner Rihanna's around, he's a wimpy-looking nerd [[TheUnintelligible who mumbles everything he says]] and is prone to [[BringMeMyBrownPants pissing himself]]. Whenever Rihanna leaves, he turns out to be an aggressive, in his own words "twisted as shit" gun-lover.
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[[folder: Pro Wrestling]]
* [[Characters/WWEDivas Maria Kanellis]] was TheDitz as a backstage interviewer to start off, always asking the wrong questions and getting wrestlers' names wrong. Then she had to testify at Wrestling/EricBischoff's ({{Kayfabe}}) trial...
---> '''Maria:''' Last week Bischoff abused his power in a way that was both malicious and capricious, and it’s this rash of discourse that ultimately led to a locker room of disdain and mutiny, and it should be grounds for his immediate dismissal.
** She went back to the ditzy gimmick for quite a while afterwards. In a subsequent appearance, Bischoff flat-out accused her of using ObfuscatingStupidity based on what happened at his trial, saying she pretended to be "stupid and sweet" to curry favor from the crowd.
* Wrestling/{{LayCool}} could count. A pair of bubbly ditzy {{Valley Girl}}s who have managed to dominate the division for over a year, capturing four sets of titles for themselves.
* During a brief feud with Maryse, Wrestling/GailKim appeared oblivious when Maryse started talking to her in French, appearing to be trying to be friendly. Anyone who understood French knew Maryse was secretly trash talking and Gail looked to be falling for it. Then Gail dropped the bombshell that she spoke fluent French and hadn't been fooled by the game.
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[[folder: Stand-Up Comedy]]
* [[Creator/NormMacDonald Norm [=MacDonald=]]] does this smiling, stuttering, dopey weirdo routine on stage and in interviews, but a brilliant quip is just around the corner. He won half a million for charity on ''Series/WhoWantsToBeAMillionaire'', too.
** In fact, the only reason he didn't get the million was because he was talked out of answering by a nervous Regis, concerned that Norm was only guessing (he was), but his idea was correct. After choosing to walk, he was asked for what he thought the answer would be. [[NegatedMomentOfAwesome Solemnly, he was told that he would've been right and gotten the million.]]
* The late English magician/comedian Tommy Cooper was an undeniable master of using ObfuscatingStupidity in his magic acts. He intentionally botched his own tricks and acted incompetent 90% of the time until he'd pretend to foul up yet another, only to pull off the trick perfectly.
* Ray Romano suggests that guys screw up shopping as badly as possible so they're never asked to do it again. "They were out of lettuce, so I got a hammer."
* Similarly, in "Chocolate Cake for Breakfast", Creator/BillCosby so horrified his wife by going along with the titular request that she told him to go back to bed.
--> '''Bill:''' Which is where I wanted to go in the first place. So you see? We are dumb, but we are not so dumb. It takes great thinking and work to [[{{dismotivation}} keep from working]].
* LarryTheCableGuy. In-character, he's a not-too-smart Southerner. Out of character, he's Daniel Whitney, a reasonably intelligent satirist. This trope is best exemplified in his book ''Git-R-Done'', where he makes deliberate typos as a form of StylisticSuck, yet launches into ShownTheirWork territory whenever he rants about something that bugs him. (To name just one example, he explains Darwin's Theory correctly.)
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[[folder:Tabletop RPG]]
* In the ''LegendOfTheFiveRings'' franchise, this is the basis of the Scorpion Clan's ''modus operandi'', as revealed to their founder Bayushi by the great sage Shinsei. Shinsei told Baysuhi a parable that Bayushi believed he already knew, about the scorpion and the frog, which normally ends with the scorpion stabbing the frog while they're crossing the river and both of them drowning because it's the scorpion's nature (this parable also appeared in the ''Series/StarTrekVoyager'' episode 'Scorpion'). However, at the end of Shinsei's version the scorpion's answer is different: "I can swim."
* The Space Wolves in ''TabletopGame/{{Warhammer 40000}}'' are not as stupid as they act, especially their Chapter Master Logan Grimnar. There is a reason he ends up running most of the wars he gets involved in, even if its from the sidelines.
** The Wolves don't really act stupid. It's just that they're entirely {{Boisterous Bruiser}}s.
*** The HorusHeresy novels place the Legion in a new light. Leman Russ frequently puts on the persona of being the rough barbarian king. This isn't just a convenient affectation for political purposes; it's also a coping mechanism for the things that he has to do. In a similar way, the Space Wolves socially act like ancient norsemen but are plan their attacks with complete and total precision.
** Likewise Literature/CiaphasCain '''HERO OF THE IMPERIUM''' isn't so much "stupid" in his obfuscations, but he makes it clear in his monologue that he needs to pretend to be much more of a gung-ho Emperor-lover than he actually is, if he hopes to stay alive and maintain his heroic reputation.
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[[folder: Web Original ]]
* A favourite trick of Sarah's in ''{{lonelygirl15}}'' and ''LG15TheResistance''. [[http://www.youtube.com/watch?v=5b4iLtNSCDg Chapter 3]] of ''the resistance'' is a good example. Furthermore, while she appears to be TheDitz a lot of the time, she's arguably the smartest member of the TAAG.
* Although most of the time WebAnimation/HomestarRunner seems just plain [[TheDitz dumb]], in the Strong Bad Email [[http://www.homestarrunner.com/sbemail98.html "stupid stuff"]], [[spoiler: he tricks Strong Bad into using reverse psychology in order to win a bet and make Strong Bad lose his.]]
** Then, in "Kick-A-Ball" [[spoiler: he seems to have made an outrageous scheme to use Strong Bad's own cheating against him. When they were picking teams at Kickball he picks Pom Pom and whispers Strong Sad as well, which appears to be his wacky nonsequitur. However, he then goes on to go through nine innings with himself and Pom Pom alone and is two points ahead with only one out left. He gets [[GambitRoulette Strong Sad to hold out his arms and catch the last ball of the game because Strong Bad didn't know he was on Homestar's team]]. This only works because Strong Bad cheated a long time ago by adding "double side-mouth whisper drafts are totally legal!" to the rules.]] Homestar has officially stolen Strong Bad's claim to {{Magnificent Bastard}}ry.
* In ''TheSalvationWar'', [[spoiler: Jesus first appears to be a shiftless stoner. Then the angels leave, and he reveals himself to be a skilled strategist as he improves on the battle plan the angels gave him.]]
* In ''Sims Big Brother 6'', Alison's strategy was to appear to be incredibly stupid, so people wouldn't think she was a threat and never nominate her. She unfortunately went a ''tad'' far with it, since managed to misspell "Apple" and people begun to suspect whether or not this was an act or not.
** It was also [[CrowningMomentOfFunny surprising]] when she suddenly spouted a college-level description of an organelle after a montage of stupid questions. ("Controversy? What does that mean?" "Influenza? What's that?" "How do you work the elevator?")
* WebVideo/TheNostalgiaChick during Kickassia, where she went from sane (or as sane as she can be) and opinionated to a SarahPalin parody who agreed with N. Bison about everything. When Part Four came around, it was found out she was just pretending to be sweet and stupid while trying to kill him off and take charge for herself.
** And then there's Kevin Baugh, who fakes being taken over by his alternate personality so he'll be allowed to keep hanging out in his conquered nation, then sets to planting doubts about the Nostalgia Critic's leadership skills. Bonus points that everyone knows he's doing this but roll with it anyway.
* ''EquestriaChronicles'': Nocturne. Possibly. It's debatable.
* ''WebVideo/DragonBallZAbridged'' turned [[spoiler: Maron]] of all people into this. [[spoiler:She was really an undercover agent investigating Krillin for insurance fraud. Still a GoldDigger, though.]]
* Sometimes Website/{{Akinator}} will ask a logical series of questions leading to your character, then suddenly start asking random unrelated questions, apparently having been thrown off the scent. In the end though, he gets the character right. He figured out what your character was early on, and was just using the remaining questions (and you) to learn more about the character in question.
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