Definitions for "Washboard"
A broad, thin plank, fixed along the gunwale of boat to keep the sea from breaking inboard; also, a plank on the sill of a lower deck port, for the same purpose; -- called also wasteboard.
protective covering consisting of a broad plank along a gunwale to keep water from splashing over the side
a narrow strake placed round a boat to keep water out
A fluted, or ribbed, board on which clothes are rubbed in washing them.
The corrugated surface of an unpaved road.
1) n. rippling effect on graded, hardpack roads caused by slow moving, poorly suspended vehicles disrupting the road surface with wheel hop. 2) v. To create a washboard surface on a road by driving slower than conditions allow.