a loose cannon

a person who cannot be completely trusted because their behaviour is sometimes strange or violent He's seen as a loose cannon by other team members. If anyone's going to get into a fight, it'll be Pete.

Common Names:

Name	Pronounced	Usage
Baade	['ba:hdʊh]
Alexandre	a-lek-SAWNDR (French), ə-lə-SHAN-drə (Portuguese), ə-lə-SHAN-drə (Brazilian Portuguese), a-le-SHAN-dre (Galician)	French, Portuguese, Galician, Catalan
EloÍSa	-	Spanish
Alojzy	ah-LOI-zi	Polish
Kiara	kee-AHR-ə	English (Modern)
Noelia	-	Spanish