Washout

From the verb wash out.

Full definition of washout

(plural washouts)

An appliance designed to wash something out.The cistern was fitted with washouts and air-valves.
(biology, medicine) The cleaning of matter from a physiological system using a fluid.a bladder washout
(meteorology) The action whereby falling rainwater clean particles from the air.
A channel produced by the erosion of a relatively soft surface by a sudden gush of water.
(informal) A disappointment or total failure; an unsuccessful person.As an actor, he was a complete washout, so he went back to accounting.
A sporting fixture that could not be completed because of rain.
The aerodynamic effect of a small twist in the shape of an aircraft wing