open and aboveboard open and aboveboard {adj. phr.} Honest. Jacob felt that the firm he was doing business with wasn't entirely open and aboveboard. Categories: add yours {adj. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: O Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment