Jizz Jammer Share definition Flag A female who while giving a male a blowjob or handy-jay shoves her hand over the head of the penis jamming the ejaculate back inside. Damn dude, Becky is such a Jizz Jammer! Jizz Jammer by MenAgainstJizzJammers January 16, 2014 Get the Jizz Jammer mug.