The Collaborative International Dictionary of English v.0.48:

Ruck \Ruck\, n.
   A roc. [Obs. or prov. Eng.] --Drayton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ruck \Ruck\, n. [Icel. hrukka. Cf. Ruck, v. t.]
   A wrinkle or crease in a piece of cloth, or in needlework.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

         The sheep that rouketh in the fold.      --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Ruck \Ruck\, n. [Cf. Ruck.]
   1. A heap; a rick. [Prov Eng. & Scot.]
      [1913 Webster]

   2. The common sort, whether persons or things; as, the ruck
      in a horse race. [Colloq.]
      [1913 Webster]

            The ruck in society as a whole.       --Lond. Sat.
                                                  Rev.
      [1913 Webster]

WordNet (r) 3.0 (2006):

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: ruck, herd]
    2: an irregular fold in an otherwise even surface (as in cloth)
       [syn: pucker, ruck]
    v 1: become wrinkled or drawn together; "her lips puckered"
         [syn: pucker, ruck, ruck up]

Moby Thesaurus II by Grady Ward, 1.0:

140 Moby Thesaurus words for "ruck":
   Everyman, Public, a mass of, a world of, aggregation, and bobtail,
   army, assemblage, average, average man, bank, bevy, bezel, bunch,
   canaille, chamfer, chase, chink, cloud, cluster, clutter, cock,
   cocker, cockle, cohue, collection, common man, common ruck,
   common run, company, congeries, congregation, corrugate,
   corrugation, covey, crack, crankle, cranny, crease, crimp, crimple,
   crinkle, crowd, crumple, crush, cut, dado, deluge, drift,
   engraving, everyman, everywoman, flight, flock, flocks, flood,
   flute, fluting, fold, furrow, galaxy, gash, generality,
   girl next door, gouge, groove, group, hail, heap, hive,
   homme moyen sensuel, horde, host, incision, jam, knit, knot,
   large amount, legion, lots, many, mass, masses of, microgroove,
   mob, mound, muchness, multitude, muster, nest, numbers,
   ordinary Joe, ordinary run, pack, panoply, plica, plurality, press,
   pucker, purse, quantities, quite a few, rabbet, rabble, rabblement,
   rag, ragtag, ragtag and bobtail, rick, ridge, rifling, rimple,
   ripple, rivel, rout, ruckle, rumple, run, rut, score, scores,
   scratch, shirr, shoal, slit, spate, stack, streak, stria,
   striation, sulcation, sulcus, swarm, tag, throng, tidy sum,
   well-worn groove, wimple, worlds of, wrinkle