naggworm
a person who will yell at you until your ears fall off and your brain explodes.
Mom: You didn't do your homework. You're gonna fail. You're gonna get in trouble. You're gonna be grounded.
Bro: I swear if you say one more thing, I'm gonna punch you.
Teacher: I'm gonna call your mom. I'm gonna write you up. I'm gonna make you repeat the year.