Tat Knuck Share definition Flag A person who has letters tattooed on their knuckles that may or may not form a word. This Tat Knuck fuck was making my Shwarma and I saw Love and Hate on each hand. Dude decide. Tat Knuck by will bitten May 26, 2018 0 0 Get merch Get the Tat Knuck mug. Buy Now — $32.95 See more merch