Source : WordNet®

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

swigging
     See {swig}