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1.
1) To quit following minimal effort; to give up.

2) To give a poor performance due to lack of effort.
Did you even try? Don't fross out on me man.
by JameelX October 24, 2007
 
2.
word used for when an individual is high due to use of a substance. word commonly used in Jamaica.
Yow bro, you look fross.

You fross man!!
by nikodaib April 08, 2011
 
3.
An alternative or slang term for a frisbee, Only the most hardcore/ experienced Ultimate bros use this term.
1.Bro 1:"Yo lets go toss the fross brah!"

Bro 2: "Okay, I'll go meet you on the quad."

2."Fross me brah."

3.Ultimate noob: "Throw me the disc!"

Bro: "It's called a Fross you tard."
by Douglas Quaid September 14, 2013
 
4.
A slang term for an Ultimate Frisbee, emerging from frat-boy college campuses around the United States. Frosses come in a variety of weights measured in grams and they are made with plastic. Not to be confused with the discus throw or disc golf.
Cam: Hey brah, wanna go to the quad after the frat party and toss the fross?
Mikey: I would man, gotta sober up first though.
Cam: Don't worry dude, it's a chillaxed game.
Mikey: Sweet, can we pass the hacky sack afterwards, and listen to some Mac Miller?
Cam: I prefer Dave Matthews.
Mike: As long as we're tossin the fross high in the clouds every little ting' is gonna be alright brah.
by MannySousa September 15, 2013
 
5.
Place. Everyone cool lives here.
Im from 'Frosses'." "I LOVE YOU!
by jimmy jam joe November 24, 2010
 
6.
a take on "fugly",

fucking + gross = fross
Tina: Ugh did you see Beyonce's dress last night?
Hannah: Fross!
Tina: I KNOW!
by califas619 February 08, 2009
 
7.
when one speaks improperly about their teacher or the other way around
Ex 1: Stacy's totally frossing on Mr. Lee

Ex 2: Mr. Johnson just frossed about Katana
by Mali M November 07, 2005