I don't give two shits - A loud, funny way to say you're so busy being cool, you don'

A loud, funny way to say you're so busy being cool, you don't even have time to care about what someone else is saying.

I don't give two shits, I'm busy being cool.

I don't give two shits, I'm getting a drink.

I don't give two shits, I'm about to win.