do up brown . do up brown {v. phr.}, {slang} To do in a thorough or complete way. When Jim does a job, he does it up brown. Categories: add yours {slang} {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: D Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Leave my opinion