Bumper Sticking 

The act of placing bumper stickers on people's cars that do not want them there. Often done with very innapropriate or embarassing bumper stickers to prank friends.

John is gonna be so pissed when he finally sees that he's been driving around with that gay rights rainbow bumper sticker we put on his truck after a successful night of bumper sticking the whole parking lot.

Bumper Sticking by tmoney234 March 25, 2011

bumpersticking 

The act sending a "friend" on the social networking site Facebook a Bumber Sticker.

I was bumpersticking a lot of pictures to friends, such as a picture of McLovin from Superbad.

bumpersticking by dumbblondemrf March 26, 2008

Bumpersticking 

A prank that can be executed anywhere, but is most prevalent among LGBTQ+ communities in the Southern United States. You begin by finding a car with copious amounts of right-wing stickers and waiting until the owner gets back. When the owner is in view, you sprint towards their car, stick a pro-LGBTQ+ sticker over a hateful one, and record their reaction as you run away.

Will and I went bumpersticking last night, and one guy pulled a gun on us! We barely got away.

Bumpersticking by localpriest March 28, 2022