v. phr. , slang To get oneself dressed up neatly and look elegant and presentable. What are you getting all couthed up for? (This derives from "uncouth" ("outlandish, ill-mannered") by leaving off the prefix "un-".)
GET COUTHED UP
Meaning of GET COUTHED UP in English
American idioms English vocabulary. Английский словарь американских идиом. 2012