doctor up . doctor up {v. phr.} To meddle with; adulterate. You don't have to doctor up this basic salad with a lot of extras as I am trying to lose weight. Categories: add yours {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 Comment on this entry