When you're playing Super Smash Brothers Brawl as Wario and accidentally make him ride his bike, which can often be a pain in the ass.
Example 1:
Person 1: Oh Crap, stupid Wario got on his bike!
Person 2: ACCIDENTAL BIKE!
Example 2:
Person 1: Aww man, I just accidental bike'd!
Person 1: Oh Crap, stupid Wario got on his bike!
Person 2: ACCIDENTAL BIKE!
Example 2:
Person 1: Aww man, I just accidental bike'd!
by Daini January 24, 2010
Get the Accidental Bikemug.