jack jacked
A guy who’s chill until someone pushes him and he goes full psycho. Like Baby JackJack from that Incredibles movie, but way more aggressive.
My cousin was chill until his brother called him a nerd. Then he went full psycho and tackled him.
My friend was being nice until someone called him a loser. Then he ran into the street and screamed at a car.
My brother was calm until his roommate called him a failure. Then he kicked him out of the house.