jizz mountain Share definition Flag It is the leaking of jizz(semen) from the asshole of man who usuaully just had anal sex. Whoa Chad, your making a jizz mountain! The semen I just released in your ass is coming out! jizz mountain by Bob's porno shop February 9, 2008 0 0 Get merch Get the jizz mountain mug. Buy Now — $32.95 See more merch