Top Definition
The penis seed is a mythical item in which a female can place in her vagina to grow a penis. As of now it does not really exist, but maybe with all these new technological advancements in the world of science, the penis seed could become a real item on your list of things to get at wal mart!
Mary used to just be a dyke, then she used a penis seed, and now she's a transexual.
by April, duhh. <3 August 21, 2007

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