Top Definition
Similar to a mushroom slap but with the added bonus of doing it after you've ejaculated and your penis is covered in semen.
Guy 1: So how'd it go with Julia last night?

Guy 2: It was awesome!... Up until she just walked out after I Cream of Mushroom Slapped her in the face...

Guy 1: Rough dude. Guess she just isn't into that kind of stuff.
by SJ U KNOW March 25, 2012

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