buttass noun 1adverb 1forms 1 noun1 •(slang, vulgar) A term of abuse. adverb1 •(slang, vulgar) Synonym of very.At least he isn't butt-ass ugly. He was probably the shit during his time. Look at him in his multi-colored, polyester suit. He's sharper than a tack. — 2015 formsbuttasses
