mud helmet 

The fecal matter caked to one's penis after sexual relations in another's anus.

Dude, after ramming Alice in the ass, I had a serious mud helmet!!!

mud helmet by cobramark20 December 27, 2008

Mud Helmet 

The after effects of inserting the penis into the dirty ass of another. When the penis is pulled out the tip of the cock is lightly covered with poo thus giving it the look of having a mud on the helmet.

Man I was hittin her in the ass and when I pulled out I had a mud helmet.

Mud Helmet by Mr. Mud Helmet June 3, 2009

mud on the helmet 

A homosexual term for when one guy butt fucks another guy. The "mud" is a crude term for shit in the bottom's anus. The "helmet" is to describe the shape of the head of the penis. When the top (helmet) rams his dick into the anus of the bottom, he gets shit (mud) on it. Thus, "mud on the helmet".

"I fucked my boyfriend so deep I got mud on the helmet."

mud on the helmet by rjc July 22, 2006

mud on your helmet 

the unfortunate act of getting poo on your wiener during anal sex... elnut is quite the expert at this (assuming he can keep it up long enough).

elnut was reduced to tears when he discovered mud on his helmet

mud on your helmet by wallnizzle November 13, 2003

mud on your helment

To penetrate someone anally with the penis.

guy1: Hey, man, you ever get mud on your helment?
guy2: Sorry, dude--I dont' swing that way.

mud on your helment by moonyewnit March 23, 2009