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.
by ilikeurmaonacid December 7, 2013
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A large animals use of their rear end to push a person out of the way.
Also is a technique used by dogs during play
My pony just bum swiped me when not wanting to get his rug on
by Low-fat milk March 27, 2018
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