The Collaborative International Dictionary of English v.0.48:

Shamble \Sham"ble\, n. [OE. schamel a bench, stool, AS. scamel,
   sceamol, a bench, form, stool, fr. L. scamellum, dim. of
   scamnum a bench, stool.]
   1. (Mining) One of a succession of niches or platforms, one
      above another, to hold ore which is thrown successively
      from platform to platform, and thus raised to a higher
      level.
      [1913 Webster]

   2. pl. A place where butcher's meat is sold.
      [1913 Webster]

            As summer flies are in the shambles.  --Shak.
      [1913 Webster]

   3. pl. A place for slaughtering animals for meat.
      [1913 Webster]

            To make a shambles of the parliament house. --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Shamble \Sham"ble\, v. i. [imp. & p. p. Shambled; p. pr. & vb.
   n. Shambling.] [Cf. OD. schampelen to slip, schampen to
   slip away, escape. Cf. Scamble, Scamper.]
   To walk awkwardly and unsteadily, as if the knees were weak;
   to shuffle along.
   [1913 Webster]

WordNet (r) 3.0 (2006):

shamble
    n 1: walking with a slow dragging motion without lifting your
         feet; "from his shambling I assumed he was very old" [syn:
         shamble, shambling, shuffle, shuffling]
    v 1: walk by dragging one's feet; "he shuffled out of the room";
         "We heard his feet shuffling down the hall" [syn:
         shuffle, scuffle, shamble]

Moby Thesaurus II by Grady Ward, 1.0:

92 Moby Thesaurus words for "shamble":
   amble, andante, barge, bowl along, bundle, claudication, clump,
   crawl, creep, dead march, dogtrot, drag, droop, flounce, foot,
   footpace, footslog, funeral march, gait, gallop, halt, hippety-hop,
   hitch, hobble, hop, jog, jog trot, jolt, jump, leisurely gait,
   limp, lock step, lumber, lumbering pace, lunge, lurch, mince,
   mincing steps, pace, paddle, peg, piaffe, piaffer, plod, prance,
   rack, roll, sashay, saunter, scuff, scuffle, scuttle, shovel,
   shuffle, sidle, single-foot, skip, slink, slither, slog, slouch,
   slow march, slow motion, slowness, stagger, stalk, stamp, step,
   stomp, straddle, straggle, stride, stroll, strolling gait, strut,
   stump, swagger, swing, tittup, toddle, totter, traipse, tread,
   trip, trot, trudge, velocity, waddle, walk, wamble, wiggle,
   wobble