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.
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   2. pl. A place where butcher's meat is sold.
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            As summer flies are in the shambles.  --Shak.
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   3. pl. A place for slaughtering animals for meat.
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            To make a shambles of the parliament house. --Shak.
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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]