do well by do well by {v. phr.} To benefit; help; treat exceptionally well. In his will Grandpa did well by all of his grandchildren and left each of them one million dollars. 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 Leave my opinion