You watch the quiet one reading the book/magazine, and I'll watch the noisy one with the gun that says he's going to shoot down anybody that isn't scared of him/her. Whether people think he's/she's a bitch or not, the loudest one will kill you dead to prove he's/she's not the bitch, and the scared one will be the one to shoot (or cut somebody up).

You watch the quiet one reading the newspaper, I'll watch the noisy one with the gun saying he's/she's going to shoot the one that isn't scared of him/her (though people don't often warn you with words). The scared one is the one that will shoot.