washout

n. total failure (Informal); washing away of soil; hole or crevice made by erosion

The term washout can have various meanings:Washout (aviation)
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Noun
1. the channel or break produced by erosion of relatively soft soil by water; "it was several days after the storm before they could repair the washout and open the road"
(hypernym) groove, channel
2. the erosive process of washing away soil or gravel by water (as from a roadway); "from the house they watched the washout of their newly seeded lawn by the water"
(synonym) wash
(hypernym) soil erosion
(hyponym) rain-wash
(derivation) wash out
3. someone who is unsuccessful
(synonym) flop, dud
(hypernym) failure, loser, nonstarter, unsuccessful person
(classification) colloquialism

(n.)
The washing out or away of earth, etc., especially of a portion of the bed of a road or railroad by a fall of rain or a freshet; also, a place, especially in the bed of a road or railroad, where the earth has been washed away.
  

     outwash