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
Zdena	ZDEN-ah	Czech
JoŽE	YAW-zhe	Slovene
Loretta	[lə'retə]
Evgeni	yev-GYE-nee (Russian), eev-GYE-nee (Russian)	Bulgarian, Russian
Kourtney	KORT-nee	English (Modern)
Batya	-	Hebrew