When one man sticks his index finger into his colon and wiggles it around until it is covered in feces and then jams it into the ear of another unsuspecting man, preferably hobo

(can also be preformed on a woman if shes one of thos ugly lesbians)
I tickled john powers's brain with a dirty willie
by Ben Preston December 2, 2006
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Noun: A slightly more extreme variation on the childish prank known as the wet willy. Instead of inserting a finger into your mouth and then into someone's ear with a twisting motion, you first insert your finger into your anus, then into the recipient's mouth. Twisting is optional.
"-Why did Suzie leave school early today?

-Johnny gave her a dirty willy and she threw up...

-HAHAHA sucks for her."
by FruitoftheLoomis October 15, 2010
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A variation on the classic Dirty Sanchez. During anal sex, the man takes his penis out of his partners ass and rubs it on his or her chin, creating a lame goatee.
After I gave her a Dirty Willis she looked like a relief pitcher for the Chicago Cubs.
by JCarino June 1, 2006
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While doing a girl doggystyle you put your finger in her butt and the put it
in her ear!
by tommy baker February 15, 2009
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The act of circumsizing ones own penis with a homeless man or woman's teeth. Then having them taking the foreskin and putting it on top of an ice cream sundae and shitting on top preferably using the blood from operation to replace said cherries.
I won't even touch a man until he's had a dirty Willy done.
by TO7372727 January 29, 2017
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A sexual act similar to the "Dirty Sanchez." While performing in the doggie style position, the man puts his index finger in the woman's anal cavity. He then removes his finger from her anus and rather than wipe it across her upper lip as in the dirty sanchez, he puts it in her ear (right or left depending on which hand he favors). The man then twists his finger as if he were performing a "wet willy" the common childhood prank.
Instead of giving her a shit mustache, he opted to give her the Dirty Willy Sanchez, putting his index finger in her ear.
by Will Nicholson November 24, 2006
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Combining the wet willy and a wet henry at the same time to give an awesome effect
by hawk johnston October 26, 2013
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