"swig" in the noun sense

1. gulp, draft, draught, swig

a large and hurried swallow

"he finished it at a single gulp"

"swig" in the verb sense

1. slug, slog, swig

strike heavily, especially with the fist or a bat

"He slugged me so hard that I passed out"

2. gulp, quaff, swig

to swallow hurriedly or greedily or in one draught

"The men gulped down their beers"

Source: WordNet® (An amazing lexical database of English)

Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.

View WordNet® License