a know-all

(British & Australian) also a know-it-all (American & Australian)

someone who seems to know everything and annoys other people by showing how clever they are No one likes him because he's such a know-all.

Name	Pronounced	Usage
Widald	-	Ancient Germanic
Robby	RAH-bee	English
Vincent	VIN-sənt (English), ven-SAWN (French)	English, French, Dutch, Danish, Swedish, Slovak
Talisha	tə-LEESH-ə, tə-LISH-ə	African American (Rare)
&Aelig;Lfno&Eth;	-	Anglo-Saxon
Bronislava	brah-nee-SLAH-vah (Russian)	Czech, Slovak, Russian