To awaken one under the influence of psilocybin from incoherence with a quick slap of the hand to the face
Tony mushroom slapped Albert so as to awaken him from his incomprehensibly negative, drug-induced rant. (But Bert just became further enraged and had to be wheel chaired to bed.)
To slap someone across the face with one's penis.
Those dudes are always mushroom slapping each other.
if someone happens to be getting fresh with you, mushroom slap them. This means pulling out your jimmy and making solid contact with their facial region.
C-dav definitely mushroom slapped that girl last period because she said "oh my gosh guys guess what happened?"
When you slap someone with your soft circumcised penis causing a small red mushroom shaped mark on the skin from the head of the penis.
Dude I mushroom slapped her last night right on the cheek, it left a red mark!
Being slapped with a wang. Usually a hard wang.
"So this chick was blowin' some guy one day, and he pulled out and gave her a mushroom slap!"
When a guy takes his hard dick, and swings it as hard as he can, hitting a person (hopefully a girl) on her body with his mushroom. If done correctly it will leave a mushroom imprint for several minutes with a lasting red spot afterwards.
(not easy to do)
ex) mushroom slap her in the face and it will leave a mark. very funny. total ownage
When u slap a bitch so hard with ur pee pee that she gets goes retarded
I herd Jenny got the mushroom slap of death now she’s in in special ed class