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A compound word referring to the male genetelia.

Often found in dark, damp, and overgrown holes where the sun don't shine.
Geoff won't stop talking about the size of his love mushroom.
by BGF February 01, 2006
A love mushroom is when you repeatedly slap your partner in the face with your penis on exactly the same spot so that they have the red outline of your erect penis on their face.
I gave my girlfriend a love mushroom while she was sleeping this morning.
by Sam1237 November 17, 2011