Source : Webster's Revised Unabridged Dictionary (1913)

Ruck \Ruck\, n.
   A roc. [Obs. or prov. Eng.] --Drayton.

Ruck \Ruck\, v. t. & i. [imp. & p. p. {Rucked}; p. pr. & vb. n.
   {Rucking}.] [Icel hrukkast to wrinkle, hrukka wrinkle, fold.]
   To draw into wrinkles or unsightly folds; to crease; as, to
   ruck up a carpet. --Smart.

Ruck \Ruck\, n. [Icel. hrukka. Cf. {Ruck}, v. t.]
   A wrinkle or crease in a piece of cloth, or in needlework.

Ruck \Ruck\, v. i. [Cf. Dan. ruge to brood, to hatch.]
   To cower; to huddle together; to squat; to sit, as a hen on
   eggs. [Obs. or Prov. Eng.] --Gower. South.

         The sheep that rouketh in the fold.      --Chaucer.

Ruck \Ruck\, n. [Cf. {Ruck}.]
   1. A heap; a rick. [Prov Eng. & Scot.]

   2. The common sort, whether persons or things; as, the ruck
      in a horse race. [Colloq.]

            The ruck in society as a whole.       --Lond. Sat.
                                                  Rev.

Source : WordNet®

ruck
     n 1: a crowd especially of ordinary or undistinguished persons or
          things; "his brilliance raised him above the ruck"; "the
          children resembled a fairy herd" [syn: {herd}]
     2: an irregular fold in an otherwise even surface (as in cloth)
        [syn: {pucker}]

ruck
     v : become wrinkled or drawn together; "her lips puckered" [syn:
          {pucker}, {ruck up}]