Slang reference to the male erection. Specifically used to describe someone with an exceptionally "hard"; yet, pitifully small erection.
GIRL 1: What happened with James last nite.
GIRL 2: He came out of the bathroom, nakid with an angry mushroom that made me laugh hysterically.
GIRL 1: Then what?
GIRL 2: He started cryin and left
by el-dday January 14, 2007
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When your dick's head is smaller than the width of your cock
I have to warn you, I have an Angry Mushroom
by Poop Inspector May 15, 2018
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