pickpocket

from WordNet (r) 3.0 (2006)

pickpocket
    n 1: a thief who steals from the pockets or purses of others in
         public places [syn: {pickpocket}, {cutpurse}, {dip}]

from The Collaborative International Dictionary of English v.0.48

Pickpocket \Pick"pock`et\, n.
   One who steals purses or other articles from pockets.
   --Bentley.
   [1913 Webster]

from Bouvier's Law Dictionary, Revised 6th Ed (1856)

PICKPOCKET. A thief; one who in a crowd or. in other places, steals from the 
pockets or person of another without putting him in fear. This is generally 
punished as simple larceny.

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