1. Characteristic of an enemy or one eager to fight
   - aggressive, belligerent, chippy [N. Amer] 
2. Annoyed and irritable
   - crabbed, crabby, cross, fussy, grouchy, grumpy, bad-tempered, ill-tempered, arsey [Brit] 
3. (informal) brilliant; very good
   - brill [Brit], wicked, ace, def, magic [Brit]

1. Someone who is aggressive, belligerent or bad-tempered

Derived forms: badasses

See also: hostile, ill-natured

Encyclopedia: Badass

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