a bad egg

A dishonest or ill-behaved person. Primarily heard in US. We could tell he was a bad egg even at a young age.

(mainly American informal)

someone who behaves in a bad or dishonest way He's a bad egg - don't believe anything he says.

Name	Pronounced	Usage
Ceri (2)	KE-ri	Welsh
Clare	[klɛə]
LÉOne	-	French
Bernadette	[.bə:nə'det]
&Aelig;&Thorn;Elbeorht	-	Anglo-Saxon
Sammi	SAM-ee	English (Rare)