2 n. — Politics, Quebec
a member or supporter of the Parti Québécois.
Type: 1. Origin — The Parti Québécois was formed in 1968. The term Péquiste appears to have been coined shortly after in order to designate its members and supporters. Péquiste probably comes from the acronym "PQ", used adjectivally, onto which is attached the French suffix "-iste". Like its English cousin "-ist", "-iste" denotes a follower of something, in this case PQ principles.
The term is used almost exclusively in Canada (see Chart 1).
In Canadian English, the term is used with or without diacritics.
See also COD-2, s.v. "Péquiste", and " Gage-5, s.v. "Péquiste", which are marked "Cdn", and ITP Nelson, s.v. "Péquiste", which is described as "Quebec".