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When someone is lying on their back and a female straddles his or her face and begins pouring an alcoholic beverage down the crack of her ass and into the persons mouth.
I think there was a dingleberry in that mudslide.

Why dont you lay down and let me give you a mudslide.
by Chester4220 May 11, 2010
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An alcoholic drink which many bar and grills are inept at making correctly. A mudslide consists of equal parts Vodka, Kahlua, and Bailey’s Irish Cream. Should be served with cracked ice in an pre-chilled old-fashion glass or you can make a frozen mudslide dessert in a blender by adding 2 to 3 scoops vanilla ice cream. Both versions are delicious.
I hate it when I have to tell the bartender what a drink is and how you make it, particularly when it is such a well-known one such as a mudslide.
by OneBadAsp October 28, 2006
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After intense anal sex let your dick go limp, then have your partner poop, forcing your flaccid penis out with the poop in one giant mud slide.
Dude, she gave me such an intense mud slide last night.
by lillyconlentes August 23, 2012
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When a man is performing anal sex on a woman, and in the middle of the act, the woman experiences a bout of explosive diarrhea.
Guy One: So how was that girl from the bar last night.

Guy Two: Don't ask.

Guy One: It couldn't have been that bad.

Guy Two: It wasn't until we experienced a major mud slide.

Guy One: Gross!!
by Sedative25 July 08, 2013
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Immense pleasure during the act of sex resulting in an accidental bowel movement covering the partners genitals. Resembling a mud slide.
"Dude, that chick totally had a mud slide all over me!"
by michael smego January 18, 2008
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