Top Definition
A sex act in which a guy masturbates using the hole of a donut and his cum lands on the top, and then a girl eats it.
"Dude, did you hear? They were caught out behind a donut shop frosting the donut!"
"Dude, that girl's crazy!"
by Keledine December 22, 2011
1 more definition
5 Words related to Frosting the Donut
To simultaneously defecate and vomit.
"Last night I was so wasted I sat on the toilet to take a dump, and before I could stop myself I'd frosted my donut."
by The Yellow Dart June 28, 2004

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