often used in the term of diminishing communication and/or contact with a certain person for various reasons. this could also mean that the person doesn’t want to be connected or “linked” to any part of someone and/or that persons life anymore.
elli: time to unassociate.
Matt: Kathy stopped talking to me completely-but we see each other everyday.
John: ouch…she did some unasssociating.
Matt: what is that ?
John: unassociating is similar to unfriending or unfollowing, except she did it in real life.