Source : Webster's Revised Unabridged Dictionary (1913)

Spindleshanks \Spin"dle*shanks`\, n.
   A person with slender shanks, or legs; -- used humorously or
   in contempt.

Source : WordNet®

spindleshanks
     n 1: a thin person with long thin legs [syn: {spindlelegs}]
     2: long thin legs [syn: {spindlelegs}]