know-it-all

"She is—and she's just what you need," said Sue, with that know-it-all smile of hers.

Lewis was one of these stuck-up, know-it-all johnnies, not long breeched.

He is impressed with the suggestion that the speaker is a "know-it-all" fellow.

He must keep in sympathetic touch with the new, damning the know-it-all frame of mind.

None of the new girls appeared to be inclined toward a “know-it-all” attitude, for which Jane was grateful.

"I've a good mind not to tell you, Mr. Know-it-all," exclaimed Johnny Chuck.