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.
by Meaty Pablo November 17, 2007
by Chthonic December 13, 2006
One definition of lesbians, (clam meaning vagina) insisting that the two women have sex by rubbing one of their vaginas against the others vagina.
by leanna :) April 07, 2006
by Brandt1dudes January 27, 2017
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.
by SavetheGiraffes November 16, 2005
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,
by Daman Money January 25, 2010
Another word for an umbrella.
by JSmitty March 31, 2007