mud flap 

Getting shit on the back of ones testicles due to explosive diahhrea.

That Taco Bell I ate came out so fast I mudflapped it.

mud flap by W.E. Coyote August 20, 2003

mud flap 

mud flaps are the lips lining the pussy, a good example of mud flaps that are easily visible would be a hot asian chicks.

her mud flaps were sdo loose and flappy they looked like a ball bag.

mud flap by dave(Dream team) January 27, 2005

Mud Flap 

A gay man's condom.

Dude, good thing you were wearing that mud flap!

Mud Flap by gdude April 13, 2009

mud flap 

what you would call a gay man's balls

yeah...get it...mud flaps..hehehe

mud flap by bill brasky April 20, 2005

Mud Flap 

The foreskin of a gay male.

He has a nasty Mud Flap

Mud Flap by Xray_man69 September 14, 2006

Mud flap 

The male scrotum (balls); What men use to keep mud (shit) off of ones penis while dropping a wicked doo-doo bomb.

Man, I had some wicked diarrhea last night; I'd have doo-doo all over dick, if it weren't for my mud flap!

Mud flap by billy_banana May 23, 2010

mud flap 

A person whose usefulness barely extends past that of a tire shroud or bug deflector.

Can't you do any right? You're a mud flap! Now get me a beer!

mud flap by Bigelow October 16, 2003