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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
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2
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
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FOY stands for: the Fountain Of Youth. A magical substance that allows one to stay young for an extended period of time and never age. They must drink or bathe in it for it to work. This legend has been around for millenniums and is still around today.
Evil old witch: I must have the FOY ! it is the only way i will be beautiful again!!
Servant: Yes master. I will search every inch of the world to find it.
Evil old witch: Cackles wickedly
by RhiRhi Got back December 18, 2015
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Fuck off yank. Used mainly in British internet slang when American freedom begins to cause discomfort.
American: enjoys freedom

Briton: enviously FOY
by Psycho Robot June 30, 2016
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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
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He treated his daughters to Disney on Ice, then to the aquarium and then a day of skiing. He is FOY.
via giphy
by emilydee01 December 30, 2016
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