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
Asma	-	Arabic
Maeleth	-	Biblical Latin, Biblical Greek
Domitian	-	History
Yafe	-	Hebrew
Abbas	[ə'bæs]
Wandalin	-	Ancient Germanic