Source : Webster's Revised Unabridged Dictionary (1913)

Drudge \Drudge\, v. i. [imp. & p. p. {Drudged}; p. pr. & vb. n.
   {Drudging}.] [OE. druggen; prob not akin to E. drag, v. t.,
   but fr. Celtic; cf. Ir. drugaire a slave or drudge.]
   To perform menial work; to labor in mean or unpleasant
   offices with toil and fatigue.

         He gradually rose in the estimation of the booksellers
         for whom he drudged.                     --Macaulay.

Drudge \Drudge\, v. t.
   To consume laboriously; -- with away.

         Rise to our toils and drudge away the day. --Otway.

Drudge \Drudge\, n.
   One who drudges; one who works hard in servile employment; a
   mental servant. --Milton.

Source : WordNet®

drudge
     n 1: one who works hard at boring tasks [syn: {hack}, {hacker}]
     2: a laborer who is obliged to do menial work [syn: {peon}, {navvy},
         {galley slave}]

drudge
     v : work hard; "She was digging away at her math homework";
         "Lexicographers drudge all day long" [syn: {labor}, {labour},
          {toil}, {fag}, {travail}, {grind}, {dig}, {moil}]