Jizzjamas Share definition Flag When a man is masturbating through the opening in his pajamas and he accidentally cums all over the crotch area. "Why is his crotch all slimy?""He must be wearing some jizzjamas." Jizzjamas by TreatingMyPeep October 19, 2011 0 0 Get merch Get the Jizzjamas mug. Buy Now — $32.95 See more merch