carper

from WordNet (r) 3.0 (2006)
carper
    n 1: someone who constantly criticizes in a petty way [syn:
         {carper}, {niggler}]
from The Collaborative International Dictionary of English v.0.48
Carper \Carp"er\, n.
   One who carps; a caviler. --Shak.
   [1913 Webster]
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