shroomslap 

a guy takes his dick and slaps a women across the face and leaves a shroom welt print on the womans face.

"Trav you bastard you left a shroomslap on my face!"

shroomslap by travs good fuck May 23, 2009

shroom slap 

A shroom slap is when someone uses their dick to slap someone across the face, leaving an imprint looking like a shroom on their face.

Dude, guess what?! Getz told me that Jeff gave this one guy a shroom slap on the bus!

shroom slap by ALF June 22, 2004