Fighting Network RINGS founder Akira Maeda found racists insults hurled his way by US service men at a military base, causing him to beat up four of them and make them vow to never insult Japanese people again. Maeda himself was Korean and bullied for it his entire life until Bad News Brown encouraged him not to take it anymore.
At the 1999 Fukumen World League 1999, Dirtbike Kid not only refused to wear his mask on what was explicitly a show for masked wrestlers but no soldThe Great Sasuke's spin kick, which was the finish they agreed on. So Sasuke kicked Dirtbike Kid without holding back and made him tap to a neck crank.
Chris Jericho's debut in WWE/WWF had him interrupting The Rock. That's one thing that few superstars, let alone newbies like Jericho, have the guts to do. However, his second appearance had him interrupting The Undertaker.
In 2007, Santino Marella would regularly mock "Stone Cold" Steve Austin: mangling Austin's catchphrases, cosplaying as him while acting like an idiot, bashing Austin's movies and declaring him a horrible actor. When Austin finally confronts him face-to-face, he forces Santino to admit that he never actually watched any of his movies. Austin offers Santino a DVD of The Condemned and requests that he watch it before evaluating his acting skills, but Santino throws it down and stomps on it. Cue beatdown.
This is pretty much Kellie Skater's gimmick, staring in QLD and especially after she joined SHIMMER's roster in 2009. She is a good bit larger than the average woman and obvious good enough to get the invite but is nowhere near as big and strong as she thinks she is. Her taunting of LuFisto, whom she stands noticeably taller than but only outweighs by a single kilogram is but a mild example.
The WWE Divas deserve special mention here. He seemed to save his venom for two very specific Divas, Natalya Neidhart and Eve Torres. While most of the Divas are accused of being Faux Action Girl Eye Candy, he decided to pick on possibly two of the most dangerous of them. Natalya is a veteran wrestler and a member of the Hart Wrestling Family. Eve is a trained Gracie Jiu Jitsu fighter, and is (in Real Life) dating a member of the Gracie Family. He decided not only to bully the two most dangerous female Dragons, he also chooses the two most-well connected.
In the early months of 2012, Cody Rhodes made it his mission in life to mock The Big Show, calling him a fat loser and continuously showing clips of Show's embarrassing moments. No matter how many times Show catches up to him and gives him a No-Holds-Barred Beatdown, he just won't stop. Come WrestleMania 28, Rhodes ends up paying the price, as he not only got KO'd by Show, but he lost the Intercontinental Title as a result. Show then returned the favor to Rhodes, showing humiliating moments during his matches.
Damien Sandow interrupting the D-Generation X Army reunion. A rare occurrence where the bully openly acknowledges the consequences beforehand.
"Big Zeke ain't got not cuts! Big Zeke ain't got no cuts! He's big, he's strong, but he ain't got no cuts!"
"Portugal's Perfect Athlete" Shanna defeated La Rosa Negra once and another victory at SHINE 20 seemed all but certain except for the fact Shanna insisted on provoking La Rosa's self appointed bodyguard, Noemi Bosques, a then undefeated boxer who was completely fresh besides exasperation at what Shanna gotawaywith. An Easily Distracted Referee can work both ways though, so when Shanna decided to put her hands on Bosques she was quickly floored, allowing La Rosa Negra to come back.
This a frequent, real life occurence in locker rooms, where bullying vets often finding themselves knocked back by smaller wrestlers they thought woud be easy prey. Examples include John Bradshaw Layfield (WWE) (who was used as a backstage enforcer by Vince Mc Mahon himself) once getting punched out by Steve Blackmon (a martial arts expert) and Buff Bagwell (WCW) getting knocked on his ass by Earnest "The Cat" Miller (also a martial artist) after trying to push him around.