I'm 6'3 and my sister is 6'0. So the brother doesn't always steal the height haha. We call her the giraffe .
It's funny that you're considerably taller than your sister and you still get to make fun of her for her height. I had some bro-sis friends growing up that were the same way. I believe she was referred to as "sasquatch" though. There, now we're sort of back on topic.