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1.
Foy
The smell between a man's ass hole and balls. Some cases are worse then others. Said to be the one of the most horrific smells known to man.
person 1: "Man, i have an awful case of Foy at the moment. My girlfriend says its worse than ever!"

person 2: "Yeah man, I know that feel. I smelt a whole lot of Foy from "down there' last night in bed."

person 1: "It really is the worst smell."
by mengararch May 30, 2013
 
2.
foy
Foy is actually a term for the smell that accumulates between a mans balls and his arsehole, as in Gringo's arse and foy smell. It is an unusual musty smell that is surprisingly hard to rid despite a decent personal hygiene regime. Often associated with physical activity and sport.
Jesus man! Ive got a terrible case of Foy!
by Valetudo March 25, 2004
 
3.
Acronym: Fuck off, you Spur(s)!

Used mainly by Arsenal and West Ham fans in the Premier League. While they both have acronyms to support their team (COYG and COYH, which both mean "Come on you Gunners/Hammers!"), this is used against Tottenham Hotspur, both teams' main rivals.
Gooner: YEAH! Gunners beat Spurs 1-0!
Spur Supporter: We're still going to beat you in the league.
Gooner: Oh, FOYS!
Hammer: Yeah, seriously. FOYS.
by Rytex September 01, 2013
 
4.
short for Fuck Off You Slut
shank dogg went into a brothel and told the hooker to foys
by narns January 20, 2008
 
5.
Foy
(verb) to play jazz music, and generally chill out with cool cats in a dilapidated house. Only the coolest of the cool can TRULY foy.
"Who foys for us? Let's rock this joint!"
by curmudgeonlypebble October 22, 2009
 
6.
FOY
Fresh of the yacht. A rich FOB (fresh of the boat) immigrant.
His rich dad sent him to the States to study English. He's such a FOY.
by ccbud June 29, 2013
 
7.
foy
In Ireland (especially as Dublin slang) 'foy' means methadone.
i.e.; Did you take your foy this morning?
by meh meh meh bla August 24, 2012