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
Antonie (2)	AHN-taw-nee	Dutch
EmilÍA	-	Icelandic
Wenona	wə-NON-ə	English (Rare)
Proinsias	-	Irish
Halle (1)	-	Norwegian
Ercwlff	-	Welsh