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
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
Get the FOYmug. Fuck off yank. Used mainly in British internet slang when American freedom begins to cause discomfort.
by Psycho Robot June 30, 2016
Get the FOYmug. 
He treated his daughters to Disney on Ice, then to the aquarium and then a day of skiing. He is FOY.
by emilydee01 December 30, 2016
Get the Foymug. 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.
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.
Spur Supporter: We're still going to beat you in the league.
Gooner: Oh, FOYS!
Hammer: Yeah, seriously. FOYS.
by Rytex September 1, 2013
Get the FOYSmug. "He is foi". "She is foi", "They are foi"
by Tony The Tiger August 6, 2012
Get the foimug. (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.
by curmudgeonlypebble October 22, 2009
Get the Foymug.