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
Joost	YO:ST	Dutch
Daniel	['dænjəl]
Paki	-	Southern African, Xhosa
Ursula	['ə:sjulə]
Roz	RAHZ	English
Paquito	-	Spanish