clam-diggers noun calf-length trousers US The suggestion is that the trousers are an appropriate length for digging for clams in mud flats.
They go over any skirt and top off all the shorts, clam-diggers and slacks combinations you have for the summer. — SanFranciscoExaminer, p. 11, 15 June 1947
Mario Villalobess watched the bearded young vice cop, who wore a tank top and clam diggers[.] — Joseph Wambaugh, TheDeltaStar, p. 17, 1983