eat a bag - You say this when you want someone to shut up so bad that yo

You say this when you want someone to shut up so bad that you imagine them swallowing a bag full of gross stuff and it’s the best thing ever.

My teacher said, 'Eat a bag!' when I talked the whole class out of math.

My mom said, 'Eat a bag!' when I kept arguing with my brother.

I said, 'Eat a bag!' when my friend kept talking during the movie.