hissy pissy Share definition Flag To get all upset about something, often involving feeling someone else's choice of something is tacky. Kevin got all hissy pissy when I bought a shirt at Wieboldt's Department Store. hissy pissy by mmandeveille June 9, 2018 0 0 Get merch Get the hissy pissy mug. Buy Now — $32.95 See more merch