A phrase used to articulate a command when dealing with a less than intelligent person or someone who has made a poor decision (i.e a dumbass). Generally followed by the assumption you're going to penetrate their anus.

to make a significant, positive change in one's behavior and actions.

To go and have a shit, poo, crap etc

Where you bang a chick with a dildo made of her own shit while spitting and pissing on her stomach and then donkey punching her 5 times all the while singing Madonna's Like A Virgin.