bum swipe

A bum swipe is a maneuver, usually dared, in where the person involves has to rub their buttock as inconspiculously as possible against a designated member of the public, ideally without getting caught. As a game this is best performed in a busy public enviroment like a bar or a cinema.

Scott just bum swiped that police officer. Fuck sake whit a dong.

Maurice: Here Scott, I dare you to bum swipe the receptionist.