A Malawian cultural/religious (usually men's) secret society that is a central part of the Chewa tribe. Members perform a dance called "Gule Wamkulu" or the "big dance" at weddings, funerals, initiations and other celebrations or gatherings where they take the form of an animal or "beast" and communicate messages from the ancestors to the village. They may also kidnap people and do other naughty stuff like extort money.
The term can be used in reference to the society or the masked dancers themselves.

A goth who has been part of the subculture since it originally came about, or a goth over the age of 40.