Breaking character. Laughing or going out of character while performing an act. Name comes form comedian Jimmy Fallon who is famous for laughing in most of his sketches from Saturday Night Live and his late night shows.
Brody: "Man, Kyle was awful last night"
James: "Dude kept Jimmy Falloning"
by Marilyn Hardy April 26, 2014
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the retard who doesn't deserve to be on Saturday night live, he laughed in every skit he was ever in literally. if you ever encounter him punch him as hard as you can.
by Crazy Cody 112 October 28, 2010
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Quite possibly the least talented, least funny human being in existence. The living embodiment of "mediocrity". The personification of "cringe". 🤦 ♂️😬

As a stand-up comedian fallon was known for his mildly decent celebrity impressions — which sounded like the celebrities he was imitating, though he never made any actual "jokes" using said impressions. On saturday night live he was known for constantly breaking character and laughing in every sketch he was in (a characteristic lorne michaels seemed to adore 🙄). As a late night talk show host jimmy fallon is renowned for his poor monologue delivery, terrible jokes which illicit no laughter (unless you're a live audience member who is forced to fake laugh whenever the "applause sign" lights up), shitty interviewing skills, and forcing his celebrity guests to play asinine games as a "time filler" and as a distraction from his complete and utter lack of comedic talent.
by Squat Cobbler 187 January 30, 2023
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Former cast member from SNL. Extremely talented with impersonations. He would break character often, but it would make the skit funnier, since SNL is pretty lame these days. He is the reason Tina Fey(even though she is hot) doesn't look like an idiot on Weekend update since she ruins her lines all the time. Hopefully he will be in a movie that will show off his talents like Ace Ventura did for Jim Carrey.
"And WE'RE BACK!!!!!!!!!!!!!!!!!!!!!!!!"
by Oklahoma smells like shit June 19, 2004
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When one realizes that they seem to be the only one that hates something or someone that everyone else loves, enjoys, or praises, because they still harbor memories of when said person or thing used to suck.
Person 1: "Everybody loves Robert Downey Jr. now & I just don't get it. I guess I'm stuck seeing him as the awful, trainwreck he was when he was younger."

Person 2: "Sounds like you've got Jimmy Fallon Syndrome."
by noSreanganOrm March 30, 2023
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a fan of jimmy fallon, host of The Tonight Show starring Jimmy Fallon. see falpal
i saw a jimmy fallon stan on twitter today. their fandom so pure.
by doyoulikemyhandle March 2, 2020
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