from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To help to swallow by drinking a liquid, after eating something, or taking a pill.
- v. To wash something completely from top to bottom.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. eat food accompanied by lots of liquid; also use metaphorically
- v. flow freely
From wash + down. (Wiktionary)