Source : Webster's Revised Unabridged Dictionary (1913)

Fag \Fag\, v. i. [imp. & p. p. {Fagged}; p. pr. & vb. n.
   {Fagging}.] [Cf. LG. fakk wearied, weary, vaak slumber,
   drowsiness, OFries. fai, equiv. to f[=a]ch devoted to death,
   OS. f?gi, OHG. feigi, G. feig, feige, cowardly, Icel. feigr
   fated to die, AS. f?ge, Scot. faik, to fail, stop, lower the
   price; or perh. the same word as E. flag to droop.]
   1. To become weary; to tire.

            Creighton withheld his force till the Italian began
            to fag.                               --G.
                                                  Mackenzie.

   2. To labor to wearness; to work hard; to drudge.

            Read, fag, and subdue this chapter.   --Coleridge.

   3. To act as a fag, or perform menial services or drudgery,
      for another, as in some English schools.

   {To fag out}, to become untwisted or frayed, as the end of a
      rope, or the edge of canvas.

Fagging \Fag"ging\, n.
   Laborious drudgery; esp., the acting as a drudge for another
   at an English school.

Source : WordNet®

fag
     v 1: act as a servant for older boys, in British public schools
     2: work hard; "She was digging away at her math homework";
        "Lexicographers drudge all day long" [syn: {labor}, {labour},
         {toil}, {travail}, {grind}, {drudge}, {dig}, {moil}]
     3: exhaust or tire through overuse or great strain or stress;
        "We wore ourselves out on this hike" [syn: {tire}, {wear
        upon}, {tire out}, {wear}, {weary}, {jade}, {wear out}, {outwear},
         {wear down}, {fag out}, {fatigue}] [ant: {refresh}]
     [also: {fagging}, {fagged}]

fag
     n 1: offensive terms for an openly homosexual man [syn: {fagot},
          {faggot}, {fairy}, {nance}, {pansy}, {queen}, {queer}, {poof},
           {poove}, {pouf}]
     2: finely ground tobacco wrapped in paper; for smoking [syn: {cigarette},
         {cigaret}, {coffin nail}, {butt}]
     [also: {fagging}, {fagged}]

fagging
     See {fag}