LaBarbara: You can't argue with those luscious pecs!Similar to Gainaxing, where a male character's pectoral muscles jiggle and bounce, except that they flex them to make it happen. However, generally it is used not so much for Fanservice as it is used as an often comedic demonstration of "manliness". Other names for it are the "Pec Bounce", the "Pec Dance" (usually this name is used if people flex their pecs in time to music), and the "Pec Pop". Another variant is the "Ab Wave", where a character with a well defined six pack will flex their stomach muscles like a wave. Generally, this isn't so much saying "look how strong I am" as it is "aren't I sexy?" For cases of Pec Flex when the flexer has less than impressive pecs, see Flexing Those Non-Biceps.
Hermes: No I can't. But I can ask him to stop wiggling them in my face!
Barbados Slim: I'm not wigglin' dem. Dey do dat by demselves.
Hermes: No I can't. But I can ask him to stop wiggling them in my face!
Barbados Slim: I'm not wigglin' dem. Dey do dat by demselves.
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- Not surprisingly, this is part of the act for the Happy Bodybuilder Directing Traffic in this GEICO commercial.
- This also happens in one Fruitsnackia commercial (to be more specific, the wrestling commercial.)
- If Terry Crews appears in an Old Spice commercial, expect this to happen.
- This also happens in a Brazilian Doritos commercial.
- Happens in a personalized Valentines M&M commercial where a guy tattoos his pecs to have him and his girlfriend on his pecs.
"Look! We're dancing!"
- This also happens in a Boost Mobile commercial of Travis Barker.
- Happens in an Indonesian commercial for an energy drink with milk.
- A bodybuilder in a cow suit does this in an Applegate hot dog commercial.
- Gary Lineker does this in a Walkers Max potato chip commercial.
Anime & Manga
- In the Pokémon anime, the obese Gligarman's chest shakes in surprise. Homina homina--NO.
- Alex Louis Armstrong of Fullmetal Alchemist. It has been ♥♥♥ PASSED DOWN THE ARMSTRONG LINE FOR GENERATIONS! ♥♥♥
- Jack Rakan of Mahou Sensei Negima!. At one point, he even uses it to completely shatter a Pocket Dimension.
- Gateau Mocha in Sorcerer Hunters, constantly. Especially in the manga.
- Being one of the manliest characters in Lyrical Nanoha at the time, Fan Web Comic StrikerS Nano had this as part◊ of the Running Gag character trait of Zest.
- In Yowamushi Pedal Izumida does this often, which he shockingly names it Andy and Frank During the faceoff with Hakone Academy
- In Bleach, Ikkaku Madarame gets his shoulder dislocated in a fight. He immediately does a Pec Flex so epic it resets his shoulder.
- In Fist of the North Star, Kenshiro faces a sergeant warrior who wields strange straw weapons that quickly suck all the blood out of their victims. Kenshiro nonchalantly lets himself get impaled by about 8 of them and shows off by flexing so epically that the straws stop draining and pop out of him.
- In Mobile Fighter G Gundam, just doing this was enough for Colonel Ulube to deflect Chibodee's ultimate technique, the Bursting Machine-Gun Punch.
''I wanna do that! But I can't!"
- It is worth mentioning that this line appears when Lina Inverse sees the "Dragon Blood Macho Battlers". A gang of bandits whose STANDARD GREETING apparently is to flex and twitch their pecs.
Films — Animated
- This is done by Young Macintosh in Brave, in his attempt to impress Merida during the suitor presentation.
- In Moana, Maui does this at the beginning of his "I Am Great!" Song. Even better, he flexes each pec one after the other, bouncing his Animated Tattoo across his chest! "I know it's a lot, the hair the bod / When you're staring at a demigod!"
Films — Live-Action
- Comes up in Spice World during a video shoot involving a lot of buff men.
- Dwayne "The Rock" Johnson also does this a few times, like in The Game Plan.
- Used as an intimidation move by one of the contestants in Balls of Fury (who happens to be Terry Crews).
- Drunken Master, Jackie Chan's 1978 film in which Jackie played a young troublemaker. At that point on the run from a promised brutal disciplining at the hands of an uncle he's never met, he scams a local restaurant. Jackie's character attempts a dine and dash, but the restaurant has a bouncer who easily blocks the way. The bouncer takes his title seriously, by bouncing his pecs to intimidate customers he intends to throw out.
- 'I am Iron Gorilla. See me jump.'
- In one scene from the very very early Arnold Schwarzenegger movie Hercules in New York, the titular Herc manages to alternate flexing each pectoral muscle. It can be seen in this video at the 0:17 mark. He also did it in an outtake of his documentary— "Pumping Iron".
- In 100 Girls the main bad guy does that in a very intimidating and unsexy way.
- David Fine does this in Her Minor Thing.
- Bob Sapp does this in Big Stan.
- Hilariously done by an old guy in My Favorite Martian, while "Hot Hot Hot" plays in the background.
- Done by Chong Li, the Big Bad of Bloodsport as a way to intimidate his opponents before a fight.
Live Action TV
- Supernatural. Sam Winchester◊, season one, episode seventeen. You're welcome.
- ... It looks like... it's winking.
- A Charles Atlas parody in Monty Python's Flying Circus.
- On Scrubs, the Janitor claims that he ran into J.D. encouraging a muscular guy to do this is what made him suspect he was gay. Being a consummate liar, the Imagine Spot story is complete fiction.
- John Enos does this five times in four separate episodes of truTV Presents: World's Dumbest... He usually does it when he has his shirt off.
- Britney Spears is shown doing it during a sketch when she hosted Saturday Night Live. In reality, she had a device under her top to make them go up and down.
- From Opportunity Knocks, we have Tony Holland, who won for 6 consecutive weeks by doing this.
- Dylan Yeandle does this in the Semi finals of Australia's Got Talent.
- Two men did this as their act on America's Got Talent.
- Blake Jenner does this in the sneak peek of the of the Glee episode, "Naked".
- Pete Lattimer from Warehouse13 rarely misses a chance to doff his shirt and pop his pecs. He once did so without prompting in front of newly-arrived gay Agent Jinks, along with comments on how glad he is to have someone around to appreciate his body and an offer to strip anytime Jinks wants.
- From Bewitched season 5 episode 22 "Going Ape" Happens when Miss Tucker come into Mr. Tate's office to advertise her new "Brawn Cologne" with muscle men to use in the commercial.
- Done often in Professional Wrestling, usually right before a match begins or right after executing a really awesome move.
- Lex Luger was one of the most frequent practitioners. Chris Masters did this as much, if not more than Lex Luger.
- Brock Lesnar, Scott Steiner, and Batista also did this.
- Frequently doen by Tony Atlas back in the 80's.
- Wade Barrett does it in the Season 1 finale of WWE NXT.
- Hulk Hogan does it during his posing after the main event of the first WrestleMania.
- Ron Simmons (back when he was Faarooq) once intimidated an interviewer by simply looking bored and standing still and doing this.
- Elektra, a valet from the real ECW, used to do this. Yeah, it was Fanservice. Ostensibly it was to intimidate the other valets, though, since she always claimed she was more woman than they were.
- See a few of these wrestlers' pec flexing abilities here.
- An episode of WWE Monday Night Raw featured The Osbournes as guest hosts, with a parody of America's Got Talent. Chris Masters' talent? Flexing his pecs to "Crazy Train". Hilarity ensued.
- On the US independent circuit, Chris Masters has a rivalry with Carlito Colón, and yes, it involves flexing, though Carlito's more defined in his abs and arms and thus loses in pure pectorals.
- This is Jesse "Mr. PEC-Tacular" Godderz's main gimmick.
- Slaking's Diamond/Pearl animation in Pokémon has it Pec Flex. Of course, they don't necessarily have to be male....
- Machoke in Crystal, too. And Machamp in Black/White. Once again, one out of four is female...
- Buzzwole in Sun/Moon is even more flex-happy than the above. It even starts flexing when hurt. Researchers in the Aether foundation theorize it has an entire language composed of different flexing poses.
- A Super Robot Wars 4koma parodying Ibis Douglas having the least bouncy chest in the series gets epically ridiculous when Sanger Zonvolt shows up barechested and does this trope after having already shown one of the bustiest characters in the series and a loli outdoing her.
- Super Macho Man from Punch-Out!! introduces himself before a fight with a Pec Flex.
- He also does it when Mac is knocked down. And when he wins...◊
- When Mac hits the mat, it's difficult to get him back up: one would be too busy cracking up at S. M. M.'s little routine.
- He steps it up a notch in the Wii version by doing just this before the match, and turning around and flexing his ass at the screen too.
- Zangief did it in several iterations of Street Fighter, even the chibi-Zangief in Super Gem Fighter Mini Mix (or Pocket Fighter, depending on locale). And in Street Fighter V's story mode, he breaks a Psycho-powered sword in two just by doing this trope.
- Leisure Suit Larry can do this after hitting the gym (a lot) in Leisure Suit Larry 3. The subtitle of the game is called Passionate Patti in Pursuit of the Pulsating Pectorials after all.
- Undertale: Aron, one of the random encounters in Hotland, is a horse-headed monster who is always flexing. It's possible to end battles against him non-violently by engaging in a flex-off with him until he flexes himself right out of the battle screen.
- Gaia Online's Halloween 2007 vampire attack event had the Von Helson Twins ordered to kill Liam. Liam seduced the twins by flexing and spouting hilariously bad come-ons, which saved his life (and scored him a threesome) but left him a couple of stalkers.
- From the Planet Fitness Clunk-A-Lunk game, we have Pecadoodledude.
Meet Pecadoodledude! You know this guy. He's the narcissistic nimrod who's always parked in front of the mirror, pausing between sets to lift up his shirt and peep his almighty pecs! He'll make 'em bounce! He'll make just the right one go! And then just the left! And then he'll juggle them back and forth! You'll wish that he'd knock himself out with one of his considerable chesticles! But he won't. He'll just keep checking himself out. So clunk away, my friend. Clunk away.
- At least to this troper, it kinda sounds like the narrator keeps complimenting the guy.
- In this video, two guys use this trope as a form of morse code.
- One guy turned this trope into a language.
- Marc Lobliner from Tiger Fitness does this in almost every video.
- One guy bounced his pecs to the Harlem Shake for about 7 minutes.
- The Fairly OddParents!:
Crocker: Those are some massive pecs.
- There are two characters that do this. Juandissimo Magnifico, Wanda's ex-boyfriend, does this along with his constant magic shirt ripping. Also, in the Made-for-TV Movie Abra-Catastrophe, Cosmo gains massive pecs from a workout video, and he Pec Flexes to absorb Crocker's magic.
- Who could forget Jorgen Von Strangle, toughest fairy in the universe. He loves to flex his muscles in the faces of anyone he can. He even refers to them as another sentient being (ex: "My muscles and I are still laughing!" Muscles: "Ha...haha...ha!"
- Johnny Bravo can juggle with his pecs as a party trick.
- The Simpsons: Homer Simpson imagined himself doing this once while under the influence of Duff. Flexing them in time to the Can Can, too.
- American Dad!: Stan Smith did the same thing as well when he was celebrating.
- Lord Pain does this in The Grim Adventures of Billy & Mandy to show off his tattoos of Grim right in front of him.
- An odd mechanical version done by Adonis in his Powered Armor in the Teen Titans episode "The Beast Within", right after he knocks Cyborg out at the beginning of the episode.
- Time Squad: Buck bounced his pecs in a cartoon cartoon Friday crossover with Johnny Bravo.
- Futurama has Barbados Slim, and his luscious pecs. They apparently wiggle by themselves.
- Happens precisely once in Meet the Robinsons.
- Young Macintosh from Brave does this in his introduction (here's the clip in question.)
- This happens a few times in Regular Show.
- Twice in "Rigby's Body", once by the bodybuilder that jumped into Rigby's body and again by Skips. His nipples light up.
- Mordecai gets one too when he daydreams in "Meat Your Maker".
- The episode "Bald Spot" features Muscle Man doing thisas a plot point. Specifically, he kept flexing his pecs (which translates in this case to jiggling his manboobs) throughout the entire episode in order to distract Starla from his bald spot on his head.
- Rigby does this after he gets buffed up in "One Pull Up".
- This also happens in two Cartoon Network bumpers of Regular Show where one's a fusion of Mordecai and Skips, and the other is two clips of "Rigby's Body" with Skips and "Meat Your Maker" with Mordecai when he daydreams back to back.
- In the My Little Pony: Friendship Is Magic episode Rainbow Falls, Bulk Biceps does this between training sessions. Fluttershy seems to think it's cute.
- Many people (mostly men) that can control their muscles will do this. Heck, anyone can do this if they're good at controlling their muscles and have the muscle strength to do so. If you actually want to know how to do so, check out these two articles.
- Any pro-Bodybuilding contest will have this.
- Bigg Vinny Mack from Trailer Choir and The Biggest Loser does this in this video.
- Mark Dalton and Zeb Atlas can do some excellent pec bouncing.
- Here's a shirtless bartender for you.
- Robert Maschio who plays The Todd in Scrubs does it in this video.