Biznatch Share definition Flag biz-NATCH = noun 1. A highly disrespectful slang term.2. Something you never call Abuelita. "Shut-up, you old biznatch!" bitch biatch biznitch Biznatch by Illuminutti March 3, 2015 0 0 Get merch Get the Biznatch mug. Buy Now — $32.95 See more merch