Shiznet Share definition Flag It's the combination of fuck and shit. When something is weird, it's shiznet. When someone is annoying, that person is shiznet. Person 1: 'Hey! Look at that TV!' Person 2: 'That's a bunch of shiznet!' Shiznet by 193xt August 30, 2014 0 0 Get merch Get the Shiznet mug. Buy Now — $32.95 See more merch