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."
A small free speech zone that can be placed on the back of a car. All varieties of crude and rude attitudes can be displayed on a bumpersticker. While some supposed funny quotes are placed on some, most immediately lose their hilarity due to repeated use.
Bumper Stickers can also be used to attempt to change tailgaters opinions.
I sure hope my Jesus loves you bumper sticker converts that guy in the volvo!