a grin like a Cheshire cat

a very wide smile

Usage notes: The Cheshire cat is a character in Lewis Carroll's book Alice in Wonderland and is famous for its big smile.

I just presumed he'd got the job because he walked in here with a grin like a Cheshire cat.

Name	Pronounced	Usage
Gunni	-	Ancient Scandinavian
Phelps	[felps]
Salamon	-	Hungarian
Victorinus	-	Late Roman
Gathbiyya	-	Arabic
Levente	-	Hungarian