I'm Like Totally, WhatEVER...That's Hella-Bad

Two young girls on the home-bound train: "You always say 'ya know' everytime you talk!" "No I don't! I never say 'ya know'!" "Yes you do! I should make a video of you doing it!" "Ya know, that's really rude when--" "SEE? You just said it AGAIN!" Girl turns away from her friend, pouting...