Top Definition
The size of one's penis. Often used in statistical classes and often mistaken for that definition. On a side note, a P-Value of 5.00 or below is considered low or "small".
Guy: Wow that was great. We should do that again sometime.

Girl: No thanks, your P-Value was way too low for me...

Guy: Oh...
by alexholder November 22, 2010

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