Acronym for "Fucking Old Guy".
That F.O.G. is so damn old he shits himself and doesn't even realize it.
بواسطة Rick Geary ابريل 9, 2007
Fly Over Gruntsquat
best performed with pre-jizz already leaking out and someone you may or may not like is passed out on their back.

work up to pre-jizz...
Fly Over Gruntsquat 'em.
pics are always handy.
again, follow the directions
F.O.G. someone this weekend....they'll love you for it.
بواسطة geoski سبتمبر 14, 2006
the day after getting really high, and you have a marijuana hang over.

not being all there the next day after consuming a lot of THC
to get over "the fog" exercise, take a warm bath, drink water until you're 100% normal
بواسطة Katlinn يناير 5, 2012
Dense; whether its weather or thoughts
He hit me with a fog when i got yelled at man.
بواسطة Cn Clear يناير 5, 2011
Def: Friend Of Girl
-Damn Spitz, you gonna rail her or what?
"Nah man I'm just gonna take her home. She's had too much to drink."
-Stop being such a F.O.G..
بواسطة silk manning ابريل 16, 2009
Flow on the Go. An act of smoking the leaf of the cannabis plant whilst driving down a long and lonesome road.
Hey man, you wanna head down Airport and take a F.O.G.?
بواسطة Nordic Jesus اكتوبر 9, 2006
Creates an obstructive fog across a scene.
With the use of a Fog and a run through the streets of London, I could hear Farqual cursing behind me.
بواسطة BartimaeusDefs اكتوبر 28, 2009

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