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1. Mud Flap
Where a fat guy doesnt have a stomach hanging in front of him like a beer belly or a keg its a big piece of skin hanging down to his waist or his knee's. Like the flaps on the back of the truck
You anda friend see a guy who streaches and lifts his shirt and all you see is skin not even shaped hanging down.

Your Friends says "Ew he doesnt even have a keg"
You say "No joke it looks like a Mud Flap hanging down like the back of a truck.

2. 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.
by W.E. Coyote Aug 20, 2003 add a video
3. 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.
by dave(Dream team) Jan 27, 2005 add a video
4. Mud Flap
A gay man's condom.
Dude, good thing you were wearing that mud flap!
5. 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!
6. 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!
by Bigelow Oct 16, 2003 add a video
7. mud flap
uncircumsized, the foreskin can be used as a protective barrier during a buggering session
no condom needed here, i already have a mud flap!
by stueyscott Jun 23, 2005 add a video
8. mud flap
The huge folds of skin near a fat girl's vagina.
I couldn't find her clit b/c of her huge mud flaps.
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