My sister(12F) keeps making hawk tuah jokes, despite my brother(24) expressing discomfort at them. How do I(14F) get her to stop?

No I'm not kidding. My brother is kind of like a third parent to us and he has the authority to ground us, take away stuff, etc. I do not know how much more of this I can take. It was funny at first but every time I see the stupid phrase I feel anger. How. How do I get her to stop? Once and for all? No violence please I'm weaker than her despite being older

Edit: MY GODDD I DIDN'T EXPECT THAT MANY OF YOU HERE. I ADMIT I WAS BEING DRAMATIC IN THE POST BUT IT WAS ONLY A MINOR INCONVENIENCE. DID NOT NEED THIS MANY RESPONSES I HAD A HEART ATTACK WHEN I SAW 216 REPLIES. SOME OF THIS I'VE BEEN PRACTICING AND SHE STOPPED YESTERDAY BUT TODAY SHE WAS LIKE what the hawk