Answer: washboards

AnswerCrossword Clue
WASHBOARDSJug band instruments
washboardsThe surface of a worn, uneven road
washboardsA board fixed along the side of a boat to prevent water from spilling in over the edge
washboardsA similar board played as a percussion instrument by scraping
washboardsDenoting a man's stomach that is lean and has well-defined muscles
washboardsA board made of ridged wood or a sheet of corrugated zinc, used when washing clothes as a surface against which to scrub them
washboardsWASHBOARD, a broad thin plank along a ship's gunwale to keep out sea water