by Poopie boobies November 29, 2016

The act of shitting ones self while wearing tighty whities and quickly ripping them off and flapping them over the head of an unsuspecting bystander.
"Dude! I totally give that bitch Shelly an irish mud flap last week...I'm pretty sure she had to shave her head!"
by Usmc1371 January 7, 2016

Roast Beef Mud Flaps are the oversized lips of the vagina that resemble the mud flaps on a semi truck if they were made out of roast beef. This phenomena is often related to the woman having an excess of sexual partners, and/or extreme stretching by the use of sexual toys.
Chris: Hey man, did you end up hitting that last night?
Ken: Yeah, but it wasn't that great.
Chris: Why not?
Ken: Well, she had a massive set of roast beef mud flaps.
Chris: Were they that bad?
Ken: Yeah, it looked like she road a chainsaw to work everyday.
Ken: Yeah, but it wasn't that great.
Chris: Why not?
Ken: Well, she had a massive set of roast beef mud flaps.
Chris: Were they that bad?
Ken: Yeah, it looked like she road a chainsaw to work everyday.
by Queef Chief May 28, 2016

Hanging a single strip of toilet paper behind your butt to prevent spraying the back of the toilet. See also "splurtin curtain"
by The Riverboat Rammer January 28, 2020

Mud Flapping is when a guy challenges or questions another guy’s manhood based on the former not being capable of a feat that he himself has just proved himself unable to accomplish
Example:
MudFlapper: “Hey bro, you got a knife I could borrow?”
RealMan: “Sorry bro, I don’t have it on me.”
MF: “What?! A real man always carries a knife!”
RM: “YOU don’t have a knife idiot. Stop all your mud flapping and get out off my property.
MudFlapper: “Hey bro, you got a knife I could borrow?”
RealMan: “Sorry bro, I don’t have it on me.”
MF: “What?! A real man always carries a knife!”
RM: “YOU don’t have a knife idiot. Stop all your mud flapping and get out off my property.
by anonymous September 14, 2020

Mud Flapped : Is the female version of getting tea bagged in a video game after you kill your opponent. The act of repeatedly squatting up and down on their head.
After being killed in my game she mud flapped me to show her dominance and to let me know I am trash.
by 4Fingersdeep September 17, 2023

An action in which a girl who's pussy is destroyed as well as having shit in it and then queefing in your face and her flaps and the shit goes go all over your nose.
by Poopooman96 March 1, 2025
