Top Definition
Blackout Boner (Noun)

1. An erection so intense that the majority of the blood in a male's body rushes to his penis, thus causing a black out and temporary unconsciousness.
That blonde girl at the bar was so hot that I just had a blackout boner and smacked my head on the table...wait, who drank all my beer?
by Robotfood February 11, 2006

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