A sexual act whereupon a man is fucked up the ass and then shits the cum and feces mixture onto the chest of his partner. The partner is then laid out in the sun with the mixture spread thin across his chest. As the sun dries the mixture, it becomes crusty. Then you punch him in the dick.
I gave your father a crusty Uncle last night.
by UncleBarry May 21, 2018
Get the Crusty Uncle mug.
a roblox troll who likes to lock people inside hotel basements.
“If I go down into your basement, will you pull an Uncle Crusty on me?”
by crusty ahh uncle December 29, 2022
Get the uncle crusty mug.