Monica: Hey, Cousin Cassie is coming to stay with us for a few days.

Ross: Cassie?

Monica: Uh-hmm.

Ross: Wow, I haven’t seen her for, like, forever. I wonder if she still carries that Barbie

everywhere she goes.

Monica: Ross, she’s 25 years old.

Ross: So what! I still have — No you’re probably right.

Explanation:

so what?    spoken   not polite   used to tell someone that something does not matter:

So what if we’re a little late?

یه کم دیر رسیدیم، خب که چی؟