Kleptomaniac

from WordNet (r) 3.0 (2006)
kleptomaniac
    n 1: someone with an irrational urge to steal in the absence of
         an economic motive
    
from The Collaborative International Dictionary of English v.0.48
Kleptomaniac \Klep`to*ma"ni*ac\, n.
   A person affected with kleptomania.
   [1913 Webster]
    
from The Devil's Dictionary (1881-1906)
KLEPTOMANIAC, n.  A rich thief.
    

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