Go ride on the head of a unicorn to hell
A way to express dissatisfaction with someone. To tell someone you do not care what they do from now on.
Boss: "Your fired!"
Employee: "Oh yea? Well, you can go ride on the head of a unicorn to hell, for all I care! I quit!"
Employee: "Oh yea? Well, you can go ride on the head of a unicorn to hell, for all I care! I quit!"