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1 definition by Piglet Michelsen

The sign of a slut. Every bitch that has a red mushroom shaped mark on the forehead or cheek is from an erect penis slapping it to signify to the other males the sluttiness of sed bitch. It is the duty of a man who has come in contact with a slut to give her the mushroom tat.
Brooke Wilson's Face. "I wouldn't touch that bitch cuz she got the mushroom tat."
by Piglet Michelsen February 01, 2008