When a man's shaft and balls become small and shriveled after participating in an athletic event. Just another great example of the adaptability of the male genitalia.
Guy 1: Dude I have some serious sports penis going on right now, my weiner is almost invisible.

Guy 2: Yeah man, that sucks. Hopefully no chicks see that, you would have to drown yourself in shame.
by stalegreen May 10, 2010

1 Word Related to Sports Penis

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