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F.U.S.S is an acronym for F-un U-nrestrained S-hameless S-ex. to have fun hardcore sex with someone that you will most likely never see again.
"hey babe wanna go back to my place and have F.U.S.S?"
by facegoogle July 14, 2011
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N: Acronym for fucked up shit.
see also: f.u.s., V-FUS
Common at drinking parties. Can be good or bad.
Good fus: finding a full 5th of bacardi 151 under the couch, the party host setting his table on fire in a small contained corner with said bacari, a solid male/female ratio with minimal gay guys.

BAD fus: spilling beer/liquor onto someone (see party foul), people making out with other people's girlfriends, packing heat to a party, pulling knifes/guns on people, lighting things on fire that don't belong to you, high male/female ratio (see sausage fest), or a large ammount of gay guys.
by Anti January 29, 2005
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1. Commonly an acronym for "fucked up shit."

2. Used disparagingly at universities for the low quality of their hoagies. "Fucked up subs."
"I'm gonna roll to Kriner and get me an F.U.S. You in?"
by Van Buren March 16, 2005
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To say that something is "Full Uh Shit", Full of Shit. Someone that states falsehoods.
That dude is totaly FUS! George Bush is completely FUS.
by CrassMonkey June 09, 2008
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