Source : Webster's Revised Unabridged Dictionary (1913)

Light-fingered \Light"-fin`gered\ (l[imac]t"f[i^][ng]`g[~e]rd),
   a.
   Dexterous in taking and conveying away; thievish; pilfering;
   addicted to petty thefts. --Fuller.

Source : WordNet®

light-fingered
     adj : having nimble fingers literally or figuratively; especially
           for stealing or picking pockets; "a light-fingered
           burglar who can crack the combination of a bank vault"-
           Harry Hansen; "the light-fingered thoughtfulness...of
           the most civilized playwright of the era"- Time [syn: {nimble-fingered}]