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
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Any activity involving the male penis. Typically as a competition of size, speed, or endurance.
Jeff and I had a hard Night of penis sports, dick jousting was one of the main events.
by 4r64 February 25, 2016
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