chutzpah
[noun]
Synonyms: effrontery, brashness, brass, cheek, confidence, crust, face, gall, nerve, presumption

[TahlilGaran] English Synonym Dictionary ▲

chutz‧pah /ˈhʊtspə/ noun [uncountable] informal
[Date: 1800-1900; Language: Yiddish; Origin: Late Hebrew huspah]
a lot of confidence and courage to do something, especially something that might involve being impolite to someone in authority – used to show approval Synonym : nerve:
It took a lot of chutzpah to talk to your boss like that.

[TahlilGaran] Dictionary of Contemporary English ▲