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

• attitude: Try to offer this type of solution to your client in an encouraging, helpful way rather then with a know-it-all attitude.

• critic: Especially when you have annoying know-it-all critics and people such as myself constantly pecking away at you.