know-it-all Definition
know·-it-all (-it ôl′)
adjective
Informal pretending or claiming to know much about almost everything
noun
Informal a know-it-all person
know-it-all Usage Examples
Adjective modifier
arrogant: Bork had proved to be his own worst enemy on television, creating an impression of an arrogant know-it-all spouting reactionary bromides.
Modifies a noun

