mc gwigbeef Posted in M Best definition mc gwigbeefname A generic definition for a person whos name starts with “Mc or Mac” when their real name has been forgotten.Pronounced: “Muc – Gwig – Beef” OI! Mc, Mac, Muc…. Bloody Mc Gwigbeef!! How satisfied are you with the definition? Looking for mc gwigbeef meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 71 times.