be my guest . be my guest {v. phr.} Feel free to use what I have; help yourself. When Suzie asked if she could borrow John's bicycle, John said, "Be my guest." Categories: add yours {v. phr.} Source: A Dictionary of American Idioms by A. Makkai, M.T. Boatner, J.E. Gates © 2024 To section: B Subscribe to: American IdiomsIdioms feedEnglish languageHome page and general feed Add my comment