1 definition by bob mcgee jr

Top Definition
The immense feeling of tiredness that follows ejaculating, whether masturbation or sex. The reason why many men masturbate in bed so they can fall asleep easier.
Last night i couldn't fall asleep, so i jacked off and the post-jizz fatigue helped me fall asleep right away.
by bob mcgee jr July 14, 2011

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