Mushroom Flip Edit Meaning

1.

When a guy has an erection in the middle of the day, in a social setting, so he uses the elastic in his shorts, or pants, or whatever he is wearing to "tame the beast."

Yo, during math i had some wood, and the teacher asked me to write something on the board, so like a champ i mushroom flipped, and stood up and answered the question

See flip