"Then STFU"

Realizing I have no school for the next 2 days. I realized I should mock my brother.

Me: Hey Ariel, You have school tommorrow?

Bro: Yea

Me: How bout tuesday?

Bro: Yea why?

Me: Because I dont.

:A steady laugh erupts:

Bro: Hey Jeff you feeling pain?

Me: No

Bro: Do you want to?

Me: No

Bro: THEN STFU!

I kind of shutup after that.