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A male who engages in the practice of inserting his penis into the anal cavity of another of the same sex.
Sir Elton John is a butt plumber.
by Larryfun August 11, 2005
When your making out with a girl you throw her on the ground and ram a plunger into her ass
That bitch is tired? Ima go butt plumber on her.
by masta d March 05, 2003