Mudflappin' 

When someone claims they can do something they cannot do.

That nigga always be mudflappin'. He ain't even much do all dat!

Mudflappin' by GoEz August 6, 2018

Mudflappin' 

The act of a female "going commando." It can get pretty messy down there, so it is up to the labium majora and labium minora to flap around freely and fight off any kind of dirt or grime.

Jon: "Hey Sally, wanna do the dirty?"

Sally: (removes pants) "What kind of dirty?"

Jon: "Eww God. It looks like you rubbed oatmeal all over your vagina!"

Sally: "I wouldn't doubt it... I have been mudflappin' all week"

Jon: "Now I see why they call it the dirty, baby."

Mudflappin' by Tough Tucca November 15, 2011

tenessee mudflapper 

The sex act of doing anal while the partner shits, creating a momentous explosion of shit

Gary did the tenessee mudflapper on Kathy and by the end of the night she had shit all over herself

tenessee mudflapper by GREENLEAN November 18, 2016

mudflapping 

Motorboating (or flapjacking) a girls ass after she poops!

I had to hose down after mudflapping that fat girls ass last night!

mudflapping by jjstl April 27, 2010

Mudflapping 

the act of motor boating your girlfriends behind.

man i totally want to be mudflapping our waitress right now

Mudflapping by mm14 November 13, 2011

Mud-flappin'

The act of not wearing underwear, for females. Just as mud flaps behind the wheels of a truck flail wildly in the wind, a saggy vagina may mimic this flapping motion without the restriction of underwear. This is the alternative to "free balling" meant for female use only.

"Dude, it's my laundry day, so I'm mud-flappin' it today."

Mud-flappin' by PACHFI May 6, 2010

Mudflapping 

The unpleasant occurrence when one's excrement leaves the anus at such a trajectory and with such a velocity such that it gets friendly with rear part of the scrotum and or testicles

Aw man, I hate it when my dung is mudflapping all over my baby makers!

Mudflapping by FapToDaMudFlap July 8, 2012