shamble: [17] Shamble ‘slouch’ and the noun shambles [15] are probably related. The latter originally meant ‘meat market’. It arose out of the plural of the now obsolete shamble ‘meat stall, meat table’, which represented a semantic specialization of Old English sceamul ‘stool, table’. This was descended from prehistoric Germanic *skamul (source also of German schemel ‘stool’), which in turn was borrowed from Latin scamellum, a diminutive form of scamnum ‘bench’.
In the 16th century, the signification of shambles moved on to ‘slaughterhouse’, and hence metaphorically to any ‘scene of bloodshed and slaughter’, but the milder modern sense ‘scene of disorder or ruin’ did not emerge until as recently as the early 20th century. The verb shamble is thought to come from the now obsolete expression shamble legs ‘ungainly legs’, an allusion to the rickety legs of the stalls or tables in meat markets.
shamble (v.)
"to walk with a shuffling gait, walk awkwardly and unsteadily," 1680s, from an adjective meaning "ungainly, awkward" (c. 1600), from shamble (n.) "table, bench" (see shambles), perhaps on the notion of the splayed legs of bench, or the way a worker sits astride it. Compare French bancal "bow-legged, wobbly" (of furniture), properly "bench-legged," from banc "bench." The noun meaning "a shambling gait" is from 1828. Related: Shambled; shambling.