Top Definition
When a white "Urkel" (Wurkel) finally gets a girl that is out of his league to have sex with him and he slips it in her butt and then says, "Did I do that"???? as if it were an accident.
When Dustin Diamond (Screech on "Saved by the Bell") made that sex tape of him having anal sex with a woman too good looking for him, it was definetly a case of the "Dirty Wurkel".

If you get a hot girl drunk enough, even the nerdiest bastard can slip her the "Dirty Urkel".
by surfwurkel December 27, 2010

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