It's bad enough for someone to be ridiculed for what they're wearing on the outside, but it's somehow more insulting to be teased for what you're wearing underneath.
This trope is when a character is teased for the kind of underwear that they are wearing, causing much embarrassment. There's any number of ways how what they're wearing under there can be known publicly, but it's usually revealed in a Pants-Pulling Prank. This is usually Played for Laughs, as the character teased just walks away with a bruised ego most of the time.
Types of underwear that end up being the target of this include:
- Goofy Print Underwear, usually of any style especially if they have a childish print, such as cute cartoon characters.
- Mens white briefs/Y-fronts, known colloquially as "tighty-whiteys," are often designated the "nerd" or "dad" type of underpants, and sometimes are meant to imply immaturity or efficiency.
- "Granny panties" are the female version of tighty-whiteys.
- Underwear in bad condition, and/or ill-fitting.
- Skimpy underwear for men, unless they have strong muscles and nice butts, as well as skimpy underwear for women if it makes them seem perverted.
- Men wearing what is considered to be women's underwear, as well as vice-versa (unless a Double Standard is in effect).
- People writing their names on their underwear.
Like all fashion styles, this is also subject to the Popularity Polynomial, depending on what was in style when the work was released; for example, briefs made a comeback in the Turn of the Millennium as the skinny fit jeans/pants rendered boxer shorts almost useless (and possibly helped by one Walter White) and character-printed underwear has come back with the rise of nerd culture in The New '10s. They even make underoos for adults now, we kid you not.
- In Inazuma Eleven, before going to training camp in episode 24, Endou's mom gave him a pair of underpants that she wrote his name on (so Endou wouldn't mix it up with someone else's, including Kabeyama) which he finds embarrassing.
- Fujiwara mocks Ishigami when she discovers that he wears briefs in chapter 70 of Kaguya-sama: Love Is War. The volume release has an extra page where he's then shown buying boxers.
- Calvin and Hobbes: One storyline starts when Calvin rips the back of his pants open on the playground, exposing his underwear.
- When the teacher calls him up to the board, he tries to delay as long as possible, but eventually goes up and moons the whole class.
Hobbes: That's why you're home early?
Calvin: Three teachers and the principal couldn't restore order.
- In Bridget Jones, Bridget has to decide whether to wear skimpy panties which will look good when she undresses or control-type undies which are more likely to get her undressed. (Shes good-looking enough, being played by Renée Zellweger, but Zellweger had deliberately put on a few pounds so as to convincingly play a woman with some insecurities about the amount of junk in her trunk.) She chooses the latter but in a surprising aversion, despite some initial alarm at the size of the panties, her date is actually turned on by them.
- French Fried Vacation: When The Casanova, Popeye, removes his pants in front of a new conquest, she can't stop herself from laughing because he wears large briefs.
- In Scary Movie, when Greg/Buffy and Ray/Brenda are making out in the back seat of the car. Greg enthusiastically removes Buffy's lacy thong panties from under her skirt. Ray does the same to Brenda, only to find himself holding a huge pair of white cotton underwear. Brenda is defensive:
"It's laundry day!"
- In Zack and Miri Make a Porno, a couple of punks video Miri changing outfits while wearing "granny panties" and post it online. She is horrified when, at the high school reunion she was dressing for, Brandon reveals that the clip has gotten two hundred thousand views in just a few hours.
- Diary of a Wimpy Kid: Greg Heffley is given a pair of Wonder Woman-themed underpants that he is too ashamed to ever wear. However, after running out of clean clothes to wear, he is forced to wear them to a birthday party where his pants end up slipping down and revealing the underpants to everyone.
- In Ellen Tebbits, Ellen and Austine are both embarrassed that they wear woolen underwear because they think it's old-fashioned.
- In a flashback scene in Harry Potter and the Order of the Phoenix, James Potter bullies Snape by doing the magical equivalent of a Pants-Pulling Prank, levitating him by his ankle so that his robe flips over, revealing what's described as a pair of "grey and sagging Y-fronts."
- The Order of the Poison Oak: Russel gets pantsed in front of his crush, revealing his white briefs. Russel alludes in this book and in Geography Club that briefs are his preferred choice in underwear but feels somewhat self-conscious about it since the popular jocks wore boxers. Expanded upon in the Soul Sucking Brain Zombies Duology where during Min's section of the book trashes men who wear briefs and thinks boxers are manly, but that was part of a fake rant to appease her girlfriend in front of her straight friends. Long story.
- In The Queens Knickers, the narrator is a schoolboy who somehow knows about the fact that the Queen is wearing her everyday knickers to school and he says to her, "Your Majesty, don't worry about your knickers. Nobody can see them anyway."
- In The Terrible Underpants, Wanda-Linda has to wear a pair of underpants that she hates because they're too big and there's a cordial stain on them.
- In the short story "Wunderpants" by Paul Jennings, the schoolyard bully makes fun of the main character for wearing underpants with fairies on them and calls him "Fairy Pants" (it's unknown whether this is a Double Standard and he'd be fine with a girl wearing fairy underwear or if he just thinks fairy underwear, in general, is silly).
- Comedienne Miranda Hart makes a career out of being a six-foot-tall woman with what she describes as an "inelegant" body shape. As Slapstick Knows No Gender, her eponymous comedy show Miranda revolves around situations where she is "Queen Kong" among petite friends, standing out a mile for her size and making herself even more conspicuous by being socially gauche and awkward. Her outer clothing is regularly torn off in bizarre and unlikely accidents revealing serviceable and unflattering underwear.
- That '70s Show sees Donna getting pantsed by Eric in a basketball game, exposing her granny panties, which Hyde delightfully makes fun of. The episode is even titled "Donna's Panties."
- Red Dwarf: In "Krytie TV", Kochanski goes on a date with an old boyfriend, to Lister's dismay. Kryten suggests that they sabotage the evening by planting in the former boyfriend's quarters (among other things) "tragically unfashionable underpants", showing off a pair for reference. Rimmer irritably points out that said underpants are his.
- In the Zoey 101 episode "Webcam," the boys sneak a webcam in the girls' common area in order to spy and learn their embarrassing secrets; one of which is that Nicole wears panties with a "Hello Bunny" print on them. She angrily says that they were on sale.
- In one episode of Family Feud, one of the questions is "What color underwear is Steve Harvey wearing?" One contestant guesses white, and Steve is very quick to point out that while he does indeed have underwear in lots of colors, not a one of them is white.
- Lance Storm found himself on the end of a Pants-Pulling Prank from Edge, revealing a pair of Power Rangers underoos, which got huge laughs from the crowd, as well as a zoom-in from the camera.
- Kurt Angle has been pantsed in the ring several times, revealing his skimpy thong, much to the crowd's delight. One pantsing incident added insult to injury as after he was pantsed, the ridiculous hairpiece he was wearing was snatched off his head, revealing his baldness (long story). It's one of his character's Running Gags as he would be flustered and struggle to pull his pants up while wrestling.
- Then WWE Tag Team Champions MNM (John Morrison, Joey Mercury, and manager Melina) were busy berating Jillian Hall from the ring, but it turned out to be a trap - Challengers London and Kendrick then attacked them from behind and pantsed Morrison and Mercury, revealing tiny blue bikini briefs, causing the crowd to laugh and the commentators to actually corpse during the segments. Melina gets pantsed for good measure, though it was mainly for fanservice purposes.
- Molly Holly, who then had a Sour Prude gimmick, had her granny panties exposed by her then-rival Trish Stratus in a Pants-Pulling Prank. For weeks afterward, Molly would be teased by the commentary as well as the fans in the arena would bring in signs mocking her underwear.
- American Dad! season 6 episode Brains, Brains and Automobiles had Steve, Barry, Snot, and Toshi immediately picked on by the other guys at summer camp, because they were wearing "whiteys of tight" which designated them as geeks. They go off to purchase boxer shorts, but then get tricked by a shady salesman selling bikini-type underwear called "culos." They then wear the culos and think they'll be the coolest kids at camp. It... doesnt go as well as they expected.
- Codename: Kids Next Door: Operation: B.U.T.T. has the Delightful Children use robot crabs to snap a photo of Numbuh 1's bare butt and use it to blackmail him. Later, they summon an army of robot crabs and one of them rips his pants off revealing Rainbow Monkey underwear. His teammates come in and rip off the Delightful Children's pants and skirts while Numbuh 5 takes a photo of them to negate Numbuh 1's butt photo as they run off covering themselves chased by their own robot crabs.
- The Cramp Twins: In "Tattoo Boy," Lucien gets pantsed by Wayne, revealing his weird underpants choice (organic undies made out of hemp that he received through the mailbox without his mother knowing), which repulses Wayne. He also threatens Lucien to tell their mom about his choice of underwear if he tells the parents about Wayne's tattoos. At the end of the episode, she finds out by herself and has the expected reaction.
- Darkwing Duck: In "Star-Crossed Circuits", at one point, the spurned D-2000 strips most of Darkwing's clothes off for a bath and then starts a painful "massage." When he escapes, he's down to heart boxers, which Gosalyn says are super dorky. Darkwing tries to recover by claiming they're very popular in Europe.
- Ed, Edd n Eddy: In "Home Cooked Eds", while going through Eddy's stuff, Marie finds a pair of leopard skin underwear. All the Kankers and Ed laugh, while Edd states "That's quite a statement Eddy". Eddy tries to pass them off as his brother's, but Marie states that his name is on the tag.
- Phineas and Ferb: In Bubble Boys, Doofenshmirtz gets his plan foiled by Perry the Platypus again so he tries to escape with a jetpack, but it flies off with most of his clothes revealing his boxers have Perry's face on them which he claims he had before he met Perry.
- In Shrek 2, Pinocchio needs to come up with a lie to make his nose grow. Donkey suggests that he should say he's wearing ladies' underwear, but when Pinocchio says it, nothing happens. When they ask him whether he's actually wearing ladies' underwear, he vehemently denies it, which does make his nose grow.
- In "If You Can't Take The Heat..." from Total Drama Island, Duncan, Geoff, and DJ steal all of Harold's pairs of pants and underpants to teach him a lesson about leaving his dirty underwear everywhere. After DJ pours a bucket of water over his pants, he goes to the cabin to change himself and comes back to the challenge set in a skimpy thong and no pants, as it was the only thing he had left (other than his pajamas). When the others see him, Courtney and Chris are disgusted, while the other Killer Basses laugh at him.
- A soldier in Afghanistan had to rush out to the defense of his outpost, firing his rifle while wearing "Hello Kitty" underpants. Showing the video, President Obama called him "the bravest man in Afghanistan".