Added 10 October 2026 knuckle-tat noun noun ! Definition from Wiktionary (CC BY-SA). More about knuckle-tat at Wordnik → Where our words come from → A tattoo on one's finger(s) just above or below the knuckle Origin Short for knuckle tattoo. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: knuckleknuckknuckleboneknucklerthumbnailknottlefingertappingknifehandknobblehandnail Back to today's word