Casket clean

Casket clean (adj.) is a compliment typically given to a male who is dressed well in a suit. Normally American men are buried in nice suits that are viewed during a wake or funeral. “Clean” is a synonym for a well-dressed or a man with a fresh haircut. See also: fly, GQ, fresh

*At a high school reunion banquet two male friends see each other after 20 years*
“Hey brother, I see you’re wearing a tailored suit with a pocket square and monogrammed shirt. You’re looking casket clean.”