[fly the coop] {v. phr.}, {slang} To leave suddenly and secretly; […]

[flying high] {adj.}, {slang} Very happy; joyful. * /Jack was flying […]

[FOAF] "Friend of a friend"; the dubious attribution given to urban […]

[foam at the mouth] {v. phr.}, {slang} To be very angry, […]

[foggy bottom] {n.}, {slang} An area in downtown Washington, D.C. where […]

[FOIG] "Find out in game"

[FOOCL] "Falls out of chair laughing".

[fooding] the act of acquiring food; often used in conjunction with […]

[for sure] or [for certain] {adv. phr.} 1. Without doubt; certainly; […]

[for the birds] {adj. phr.}, {slang} Not interesting; dull; silly; foolish; […]