bad hat

Từ điển WordNet v3.1 - WordNet Dictionary

noun

someone who deliberately stirs up trouble (Freq. 1)
• Syn:
troublemaker, trouble maker, troubler, mischief-maker
• Hypernyms:
unwelcome person, persona non grata
• Hyponyms:
agitator, fomenter, disturber, heckler, badgerer,
hellion, heller, devil, hellhound, instigator, provoker,
inciter, instigant, firebrand, loudmouth, blusterer, prankster,
cut-up, trickster, tricker, hoaxer, practical joker, rioter