(verb) The act of emancipating one's self intentionally from a group or groups of friends. Also used commonly to refer to separation from a single friend - a friend-breakup.
We still talk on facebook, but he's not someone I hang out with much anymore, I'm pretty much going to pompa him.
Royce and Marilyn used to be the best of friends, they did everything together. Then Royce started hanging out with new friends and totally pompa'd Marilyn.