naggworm
a person who yells at someone until they go deaf and wish they were dead.
Mom: You didn't do your homework. You're grounded. Again. You're gonna fail. Again. Again. AGAIN.
Bro: I swear if you say one more thing about that pizza, I'm gonna eat it and you're gonna die.
Teacher: I'm gonna write you up. I'm gonna call your mom. I'm gonna make you repeat the year. Again.