The Collaborative International Dictionary of English v.0.48:

chutzpa \chutzpa\, chutzpah \chutzpah\n. [Yiddish khutzpa.]
   aggressive boldness or unmitigated effrontery; gall; as, he
   had the chutzpah to question my decision. [Also spelled
   hutzpa, and hutzpah.]

   Syn: audacity, audaciousness.
        [WordNet 1.5]