yegg /jɛɡ/noun 1verb 1forms 3 noun1 •(slang) A person who breaks open safes; a burglar.1904, Edwin S. Porter (director), Capture of the ‘Yegg’ Bank Burglars — 1904 verb1 •(slang) To rob.The bookmakers were yegged as they left the track in the era of the hand-books. — 1956 formsyegged · yegging · yeggs