Top definition
A blumpkin that is performed whilst one or both of the participants is/are role playing as Willy Wonka characters, most notably Oompa Loompas.
Guy 1: Dude did you hit that last night?

Guy 2: Yeah, she totally gave me a scrumdiddlyblumpkin. But now my dick is starting to swell up like a blueberry, and there's orange body paint all over my toilet.

Guy 1: Damn...
by Pat did it July 13, 2009
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