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

Dumper Bumper 

Someone who enjoys giving anal sex. Can be a straight male, who likes pounding a hot chic's ass, or a gay male.

Good thing I'm a dumper bumper because my girlfriend is a real ass slut.

Dumper Bumper by Dumper Bumper March 6, 2011

Dumper bumper 

To act, or be a queerosexual and or act like the gay, fudge packer Tom Cruise.

In prison don't drop your soap because you could get sexually assaulted by a dumper bumper.

Dumper bumper by Michael Boner November 14, 2010

bumper dumper

When two cars are parked close enough together that you can rest each a butt cheek on each bumper to take a shit.

Oh man! If i can't find a bathroom i'm going to have to pull a bumper dumper.

bumper dumper by Munchus Maximus December 4, 2013