Top definition
Receiving a blow job while defecating in the upper tank of a toilet. A combination of Upper Decker and Blumpkin, also know as Top Shelf Blumpkin.
Billy is a legend, he got a box seat blumpkin from Suzy last night right after the party.
by supergenious July 20, 2009
Get the mug
Get a Box Seat Blumpkin mug for your sister-in-law Riley.