Aggressive, unhinged, crazy.
Brutal, vicious, or merciless.
Unpleasant or unfair.
Fierce and ferocious.
Nude; naked.
Barbaric; not civilized.
Great, brilliant, amazing.
Wild; not cultivated.
An aggressively defiant person.
A person living in a traditional, especially tribal, rather than civilized society, especially when viewed as uncivilized and uncultivated; a barbarian.
To attack or assault someone or something ferociously or without restraint.
To attack with the teeth.
To criticise vehemently.