His problem, it turns out, is that he is an unscrupulous, treacherous, selfish, greedy, lying, thieving scoundrel, and at the same time an irascible, ornery, cantankerous, ill-mannered, bad-tempered old grouch.
en.wikipedia.org Then on to the present day school full of violence and thugs, a school so desperate for students, they even enroll a gorilla and a bad-tempered robot.
en.wikipedia.org A mean, bad-tempered man who shows no mercy to people who owe him money and enjoys inflicting emotional pain on others.
en.wikipedia.org He is notoriously bad-tempered, to the point of forgetting his objectives once angered, but despite this he has a gentle and caring personality that makes him popular amongst his allies.
en.wikipedia.org He appears as a bad-tempered young boy with his migraine symbolized in the comic strips as wiggly lines around his head.
en.wikipedia.org