A creature that is very hideous. Often perceived as being very meek and unattractive. These creatures are often seen as the leeching sort. They will find another species that interests them and try to be just like that species. Soon then start stalking that species and then end up looking crazy. These creatures are very dangerous and they try to get all other creatures in trouble. They usually have the intelligence of a two to three year old. Often depressed and for good reason.
That fallon came over and was a manipulative little cunt.
by nthatisforyou November 24, 2010
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A really creepy kid who makes sexual innuendos about everything. No one is sure what orientation he is. The popular consensus is that he's omnisexual (anything that moves or once did). It is not know whether or not his stories are true b/c no one does the crazy shit that he claims nor would he have the time.
FALLON WOULD DO THAT!!!
by joshuaaw1030 August 28, 2008
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v. to fallon = to laugh at one's own joke, especially during the very act of telling that joke.

Origin: derived from Jimmy Fallon, American comedian (b. 1974 in NY)
Sarah couldn't manage to describe Isaac's hysterical story. She kept fallonning and then would try to start over. The 20-second story took about 4 minutes, most of which was her laughter.
by B'way February 12, 2011
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The act of taking a work dump or a post big meal dump
I love killing time at work by taking a huge Fallon!
dude I ate so much, I'm afraid this Fallon might break the bowl.
by brosauruswrecks April 3, 2015
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A fallon is a unit of measurement used to describe how sexually attractive a man is. One fallon is equal to Jimmy Fallon. This unit is typically used by homosexual men.

The fallon system has very few rules. To be a valid measurement, it must be a positive number between zero and 10. Fractions and decimals are permitted (a person can be half a fallon) but nobody can be zero fallons. Generally, a 10 is not given as it implies the perfect man, but is valid.

The fallon number system is metric, so prefixes may be added to the unit.
Hag: "What do you think of my new boyfriend?"
Fag: "He's about 3 fallons, maybe 4 after a few drinks."
by MonsterousMonster January 18, 2010
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A Fallon is an exciting and interesting person she is loving and kind and pretty extroverted but don’t let that fool you she can be scared at times but you’ll only discover that if you get close to her she is very unique you have to be a brave individual to love a fallon but in the end it will all pay off because deep down you know she loves you most likely more than you could ever imagine
You know Fallon is kind of mean sometimes but she sure loves her boyfriend
by Lelgaming825 May 2, 2018
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A girl who doesn't like memes.
Girl: "And also memes are annoying as fuck. Don't talk about them with me I hate them, nothing is funny about them even the word meme irritates me."
Guy: "Damn, you're a Fallon."
by mosdefnot February 5, 2016
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