Arse-Biscuit Share definition Flag A term used when playfully or seriously intending to insult someone. Usually a person who has done the user wrong. Arse-Biscuit!C'mon man, I'm not that bad! Arse-Biscuit by Bizarre Key April 25, 2017 0 0 Get merch Get the Arse-Biscuit mug. Buy Now — $32.95 See more merch