Jizz Jam Share definition Flag The act of placing ones hand over an ejaculating penis forcing the ejaculate back in. Damn, that bitch Jizz Jammed me last night! Jizz Jam by MenAgainstJizzJammers January 16, 2014 0 0 Get merch Get the Jizz Jam mug. Buy Now — $32.95 See more merch