Wiktionary
vb. 1 To help to swallow by drinking a liquid, after eating something, or taking a pill. 2 To wash something completely from top to bottom.
WordNet
v. eat food accompanied by lots of liquid; also use metaphorically; "She washed down her dinner with a bottle of red wine"; "He washes down his worries with a nightly glass of whisky"
flow freely; "The body washed down the river" [syn: flush down]
Usage examples of "wash down".
Deegie said, throwing out some dirty water that had been used to wash down the hide covering of the tent.
Half of the prisoners--five thousand--who cannot do so well, work the mud up into rude bricks, with which they build shelters that wash down at every hard rain.
We wash down the stew with another mug of billy tea and it can't be much later than about half-past seven when, after building up the fire so it will last until about midnight, I crawl into my sleeping bag.
The Wall would be flowing off to the south, the melting ice mingling with warm rain to wash down in sheets and rivers.
The forest was thin here, the draw she had described a broad wash down out of the higher ground where runoff and wind had swept away roost of the cover.
I always think this is because they are easy to wash down after men are sick over them.