a mixed shot consisting of Butterscotch Liquer (butt) and Captain Morgans Rum (Pirate). Usually served cold after shaken over ice...unless you like hot butt pirates that is.
Guy1: Hey barkeep...2 butt pirates please
barkeep: coming right up...you want em hot or cold?
Guy1: Shake them bitches up...we dont do warm shots!
Acronym similar to "brb" (be right back), but with emphasis on a bodily function performed during such hiatus. BRBGP standing for "Be Right Back, Gotta Poop"
John: Lets go get lunch
Mej: brbgp
Mej: ok, back...I feel like a new man. lets go get lunch