Definitions by PsyMar
B.F.G.(s)
Big fragging gun(s) -- Either a specific gun in a video game by this name, or simply the biggest, baddest, mofo-est gun in a given game, e.g. the rocket launcher in Quake I.
Those guys were pwning me at Quake II until I got the B.F.G.(s) and started fragging them all over the place.
buy-in
The amount of money required to buy a spot in a poker tournament. It's also generally your starting amount of money in the tournament.