gallows - A thing they used to hang people from before they invented c

A thing they used to hang people from before they invented chairs and took a break from being mean.

My math teacher said, 'If I fail this test, I’ll be on the gallows.'

My brother got grounded and said, 'This is worse than the gallows.'

My mom told me, 'If you don’t clean your room, you’ll be on the gallows.'