Butt Bumper
A Butt Bumper is a guy that screws around. He is a bumper of butts, Also used to describe a gay guy. Like hey look at the Butt Bumper over there talking to his boy friend, Butt Bumper. Also meaning a person that procrastinates Example hey dude you need to hire someone else this dude is a serious Butt Bumper. Also A Butt Head
Butt Bumper,
Bumper butt
It's a butt that is is very big and attractive were you wanna hit it. Like in bumper cars you wanna hit the other people.
My boyfriend has a bumper butt
Bumper Butts
A game played while on the bus whereby two (or more) people repeatedly touch butts (tap ass, moon landing, etc).
"Wow that was an exhilterating game of bumper butts! I feel like I owe you a drink!"