When two lesbians rub their pelvic bones against each other as bumper cars.
Those two chicks were carpet bumpers all night long because neither one of them had a dick!
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The act of driving a motor vehicle down the interstate while tired or intoxicated and "bumping" back and forth between the rumble strips when you pass out. Just like in bumper bowling, the ball reaches it's final goal, but not without some assistance from going in the gutter.
"Man I was way to tired to be driving last night. I was bumper bowling all the way home."
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One definition of lesbians, (clam meaning vagina) insisting that the two women have sex by rubbing one of their vaginas against the others vagina.
Cindy and Martha love eachother, they are probably clam bumpers.
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When a guy has sexual urges and decides it's time to relieve the stress. Also known as masturbating
Hey do you know where Cass went?
He's probably Welding the Bumper
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Covertly feeling a womens ass without her acknowledgement, or awareness;can be done while passing each other in a crowded area, train, or in a small space
With such a large number of sexy, and foxy women around it's not very difficult to see a guy denting the bumper.
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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,
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Another word for an umbrella.
"It's raining again. I better grab my bumper shoot."
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