Top Definition
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 #buttsex #anal #coating
by cobramark20 December 27, 2008
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.
#rusty trombone #dirty cock #dirty mushroom #dirty mushroom head #shitty cock
by Mr. Mud Helmet June 03, 2009
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