See quaff in Webster's New World Roget's A-Z Thesaurus II
verb
To take into the mouth and swallow (a liquid):
drink, imbibe, pull on, sip, sup. (Informal) swig, toss down (or off). (Slang) belt. Idiom: wet one's whistle. See mouth
noun
An act of drinking or the amount swallowed:
draft, drink, potation, pull, sip, sup, swill. (Informal) swig. (Slang) belt. See mouth
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