Balk·er n.  One who, or that which, balks.
  Balk·er n.  A person who stands on a rock or eminence to espy the shoals of herring, etc., and to give notice to the men in boats which way they pass; a conder; a huer.
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  balker
       n : a person who refuses to comply [syn: baulker, noncompliant]