Definition of wash outs:
(v) :
(idiomatic) To cancel due to bad weather.
(v) :
To fail utterly at something one has attempted.
(v) :
(idiomatic) To lose traction while going around a turn, especially in cycling, motorsports and skiing/snowboarding.
(v) :
(idiomatic) To wear away by the flow of water; to erode.
(v) :
To remove something by washing.
(v) :
To be removed by washing.