Source : Webster's Revised Unabridged Dictionary (1913)

Swig \Swig\, v. t. [Cf. D. zwelgen to swallow, E. swallow, v.t.]
   1. To drink in long draughts; to gulp; as, to swig cider.
      [Colloq.]

   2. To suck. [Obs. or Archaic]

            The lambkins swig the teat.           --Creech.

Swig \Swig\, n.
   1. A long draught. [Colloq.] --Marryat.

   2. (Naut.) A tackle with ropes which are not parallel.

   3. A beverage consisting of warm beer flavored with spices,
      lemon, etc. [Prov. Eng.]

Swig \Swig\, v. t. [Cf. Prov. E. swig to leak out, AS.
   sw[=i]jian to be silent, sw[=i]can to evade, escape.]
   1. To castrate, as a ram, by binding the testicles tightly
      with a string, so that they mortify and slough off. [Prov.
      Eng.]

   2. (Naut.) To pull upon (a tackle) by throwing the weight of
      the body upon the fall between the block and a cleat.

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}]