Metapedianism is the philosophy of focusing on the internal workings of Wikipedia, including guidelines and policies, and social side of Wikipedia, rather than editing articles and related content. Users who tend towards this philosophy are called metapedians or meta-Wikipedians and fall on the opposite end of the spectrum from exopedians. Mesopedians lie somewhere between the two.
Metapedians are often seen as the "social gadflies" of Wikipedia, doing honourable work and civic duties: giving out Barnstars, having general conversations on Talk Pages, taking part in deletion discussions and contributing largely in Wiki-Associations and places where discussion may be required, such as Articles for Deletion, Requests for Adminship, Requests for Comment, Help desk, Reference desk, mediation noticeboards, and other such places on Wikipedia that relate to Wikipedia itself.
In theory, all groups, associations, collaborations, and "cabals" are, by their nature, metapedian, although there is a metapedian-specific group called the Association of Metapedianist Wikipedians.