Don't get mad, I am just busting your chops. At the turn of the century, wearing very long sideburnsócalled mutton chops or lamb chops -- was en vogue. Lamb chop side burns also made a comeback in the late 1960s. A bust in the chops was to get hit in the face. Since Mutton Chops are no longer considered high fashion, the term has come to be figurative rather than literal.