(n.) Initials for the Mini-Game "Fists Of Guthix" in the game RuneScape.
Man 1: Hey, want to go play some FOG?

Man 2: Sure, let's pown some noobs.
by Tyler R. B. April 16, 2008
Top Definition
quite simply, Friend Of Girl... a guy who simply can not seal the deal with the ladies, or one who tries to be friends first and then develop the relationship but fails in the latter.
McDonough is such a FOG.
by PurpleKnight February 24, 2008
Fucking Outrageous Girls
Look at those FOGs running!
by FOG1 November 30, 2009
simply put its short for Fuckin Old Guys
while on the bus, a whole bunch of f.o.g.s were standing at the next stop. it took twenty minutes for all three of them to get on. i was late to watch Baywatch reruns and i missed the NASCAR race

Jesus, i hate driving behind f.o.g.s when they only do 20 in a 40 zone..put your foot into it old man
by swimmerdog August 10, 2012
Fucking old guy. The old men who always creep on tounger women, like they actually have a chance.
"That F.O.G. keeps creepin on me"
"I just hit that F.O.G.'s Mini VAn"
by queeney November 09, 2007
Fucking old guy the generalized term, or fucking obese girl
God shes a fog
by REAL FOG February 24, 2015
/fôɡ/ : a friend of the gays; or questionably straight men with perfect hair and impeccable style who partake in activities such as shopping and SoulCycle, and appear to be gay in every way, but have girlfriends.
A: "My boyfriend loves to shop! We go shopping together all the time..."
B: "He sounds like a fog to me."

Ex: You've got to kiss a lot of fogs before you'll find you're prince.
by augustusandhazel April 30, 2015
"fresh out of grade school." Basically, a grade nine, or when someone acts immature. It is interchangeable with the term "niner" only FOG is more fun to say...
-(Let's say Jill is acting immature), One may say, Jill is so FOG.

- All the guys on the rugby team are FOG.
by Not A FOG October 19, 2010

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