When you smack someone across the face with a dildo.

The act of forcing someone to kneel down (have them stand if they are much taller than you), then removing all your clothes, and getting to a good distance. Once you have achieved the desired distance, you then run and jump, swinging your hips causing the head of your penis to slap them in the face, leaving a bright red imprint shaped like a mushroom.

Please exercise extreme caution when performing the Flying Mushroom Stamp. Serious injury may (and often will) occur.

when a gay male slaps his penis on the forehead of another male, marking him as his sex slave with a mushroom-shaped mark.

to leave a mushrooom shape on a girls face after slapping her with your shlong

a large mushroom shaped mark created by the effect of a dick-slap straight to a face or more specifically cheek and forehead region.

When throwing a fried mushroom at someones head and it explodes. The hot grease leaves the impression of a mushroom on there face

When you hold back your cock and let it go to hit someone in the forehead,thus leaving a mushroom stamp