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2 definitions by PsyMar

 
1.
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.
The buy-in for the annual World Series of Poker is $10,000.
by PsyMar June 26, 2004
 
2.
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.
by PsyMar February 18, 2006