sitting duck

from WordNet (r) 3.0 (2006)
sitting duck
    n 1: a defenseless victim [syn: {sitting duck}, {easy mark}]
    
from Moby Thesaurus II by Grady Ward, 1.0
47 Moby Thesaurus words for "sitting duck":
      babe, boob, breeze, butt, chump, cinch, credulous person, cull,
      dupe, easy mark, easy pickings, easy target, easy thing, fall guy,
      fish, fool, gobe-mouches, greener, greenhorn, greeny, gudgeon,
      gull, innocent, leadpipe cinch, mark, monkey, patsy, picnic, pie,
      piece of cake, pigeon, plaything, prize sap, pushover, sap,
      saphead, schlemiel, setup, sinecure, sitter, snap, stooge, sucker,
      toy, trusting soul, velvet, victim

    

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