Top Definition
A pronounced mushroom head (PMH) is identified by a glans (or penis head) that is characterized by a distinct mushroom shape with a circumference that is significantly larger than the penis shaft. PMH is thought to bring greater pleasure during intercourse to females because of the friction created by the mushroom-shaped head (in contrast to the pencil dick) on the clitoris.
What did his penis look like? It was beautiful, he had a very pronounced mushroom head (PMH).
by eeyore777 December 06, 2010

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