testerical
Overly aggressive, irritable, or unreasonable, as from being overwhelmed by testosterone.
If the police at the G20 protests were pumped-up, testerical, itching for a fight, it was partly because their commanding officers have spent years blurring the distinction between peaceful campaigners and terrorists.
Where it comes from
From testes, by analogy to hysterical. Coined by American activist Juli Loesch in 1972 along with testeria.
Adapted from the Wiktionary entry testerical (CC BY-SA 4.0).