Intransigent
Importunate, Clamant
Strident
Rigorous, Adamant
Obstreperous
Frenetic, Clamorous
Contumacious
Tactless, Atrocious
Nefarious
Dishonest, Corrupt
Vitriolic
Sarcastic, Spiteful
Inimical
Antagonist, Opposite
Pejorative
Abusive, Offensive
Paradigm
Example, Instance
Garrulous
Talkative, Mouthy