washboard (plural washboards)
- A board with a corrugated surface against which laundry may be rubbed.
- (music) Such a board used as a simple percussion instrument.
- (nautical) A board fastened along a ship's gunwale to prevent splashing; a splashboard.
- A stretch of ripples or bumps on a dirt or gravel road, mostly occurring at corners; which is caused by wear from traffic, erosion from wet weather, or poor grading.
board to do laundry
a board on the gunwale of a boat to stop splashing - a splash board