What do you call a party to exorcise an evil and nasty person from your life?

A party to exorcise an evil and nasty person from your life can be humorously referred to as a "toxic exorcism" or a "negative energy cleanse." While not a formal concept, it symbolizes a gathering aimed at celebrating liberation from toxic relationships. Participants might engage in activities that promote healing and positivity, effectively "banishing" the negativity associated with that person.