projectile pissing Share definition Flag It's like projectile vomitting, but when you pee. 'Sure it's self-explanatory. Person 1: Eww, dude. What happened? Person 2: Projectile pissing; made me miss the toilet seat. projectile pissing by Teslarossa May 17, 2017 0 0 Get merch Get the projectile pissing mug. Buy Now — $32.95 See more merch