A different name for a pistol. Usually a Glock 17, a pistol used by most gangsters.
Guy 1:Yo shut up or i'll pull a three piece
Guy 2:Wow calm down
the act of a female sucking your dick, tickling your balls and licking the guch (spot in between the ballsack and bootyhole)
denise was giving me the three piece but she got to close to the bootyhole, so I had to slap a bitch.