a piece of bad information that usually results in a girl being anally penetrated and the guy shitting on her head.
1. "why did you tell me that freakazoid is a normal guy? that was the most janky bum gouge you've ever given me!"
2. "i've gotta take a shower after that bum gouge last night."
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.