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.

Source : WordNet®

drudging
     adj : doing arduous or unpleasant work; "drudging peasants"; "the
           bent backs of laboring slaves picking cotton"; "toiling
           coal miners in the black deeps" [syn: {laboring}, {labouring},
            {toiling}]