Bumpin their Chops 

People who are running their mouth and talking shit.

That ol' dusty ass crew was bumpin their chops so we had to regulate.

Bumpin their Chops by Cristol February 20, 2010

bumping rails

Snorting lines of cocaine.

"She was in here every night bumping rails, that girl had a coke habit!"

bumping rails by cosmic42 June 30, 2017

Dumper-Bumper 

A reinforced toilet seat for fat/chunky people. Commonly found in trailer parks.

Damn, Aunt Bessie I didn't know you had a dumper-bumper!

Dumper-Bumper by the dumper-bumper bandit February 25, 2009

Humper Bumper 

1. Nown - Butt
2. Nown - Ass
3. Nown - Backside
4. Nown - Booty

Check out the humper bumper on that chick.
That girl has a thick humper bumper.

Humper Bumper by wile September 8, 2013

bumper nuts 

Prosthetic testicles used to adorn the oversized vehicles of those who think very highly of themselves.

They aren't entertaining and they don't make you look cool.
They are contrived and make you look uneducated.

Jeff hung a pair of bumper nuts on his Tacoma.
Jeff's truck only shuttles him to and from work and the grocery store.
He did take it off-road once, and ironically his ground clearance was insufficient to prevent a rock from removing a portion of his oil pan and wrenching the faux balls of his otherwise unused trailer hitch.

bumper nuts by Fieldgrunt March 28, 2007

bumper fucker 

(n). See tailgater or bumper rider. Anyone driving so dangerously close to another car's bumper that the driver in the front car cannot see the tailgating car in the rear view mirror. The driver who bumper fucks sometimes often does so and then turns off on a side street. This is called bump and dump. Bumper fuckers who tailgate, then drop back then tailgate and drop back, is a daredevil tactic known as clipping and dipping.

Hey Ron, would you slow down? I can't Janet, I got a bumper fucker in back of me!

bumper fucker by boggler December 28, 2005

Bumpercoat 

1) A winter game in which one person wearing a puffy coat forcibly bumps into another person wearing a puffy coat, triumphantly declaring, "Bumpercoat!" It is similar to bumper cars, but with humans and puffy coats.

2) When you're fucking a girl doggy-style, you pull out and skeet all over her ass, coating it with jizz.

I totally bumpercoated Eliot last night!

Bumpercoat by Jibily July 22, 2008