From WordNet (r) 3.0 (2006):
swig
n 1: a large and hurried swallow; "he finished it at a single
gulp" [syn: gulp, draft, draught, swig]
v 1: strike heavily, especially with the fist or a bat; "He
slugged me so hard that I passed out" [syn: slug, slog,
swig]
2: to swallow hurriedly or greedily or in one draught; "The men
gulped down their beers" [syn: gulp, quaff, swig]