>Truculent \TRUCK-yuh-lunt\ (adjective)

MSWORD’s definition:
Aggressively or sullenly refusing to accept something to do what is asked
Hostile, fractious

M-W’s Word Central:
ready and willing to fight or quarrel

Sentences:
Because there were several truculent boys in her classroom, Mrs. Baumgartner left the arduous homework announcement until the last possible moment.

Billy’s truculent attitude killed any sympathy Officer Barlow initially felt for the boy.