shiznitz Share definition Flag the coolest, awsomest thing you could ever think of. this thing is beyond the coolest thing you can think of. Jimmy: I got this mountain bike it is so cool! Humphrey: Well I got this BMX it is the shiznitz! shiznitz by little chica January 22, 2009 0 0 Get merch Get the shiznitz mug. Buy Now — $32.95 See more merch