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".
See also: Creditiste Bloquiste Parti Québécois
- 1970  Maybe if you're a leftist or a Pequiste, you're in effect FLQ. The net is suddenly a little wider, and out for more fish, than we have been led to believe from the impression that the government was just hunting two or three kidnapping cells.
- 1982  In addition to attacks from their own community, these English Pequistes, numbering fewer than 1,000 in a party of almost 300,000 members, must also face the slurs of radical "pure laine" members, who would like to purge the party of the "maudits anglais." 
- 2000  The 418 and 450 belts are the two regions of the province where the Quebec Liberals are chronically weak, and where they lost 15 seats in the last election by a total of 10,000 votes. Given the composition of the National Assembly, with 75 Pequistes to 49 Liberals, that would have changed the outcome of the election if all those votes had fallen the other way. 
- 2015  Like many young anglophones living in those turbulent political times in Quebec, I was not sure where I fit in. Mr. Doré was young, attractive and articulate in both official languages, but he had been René Lévesque's press secretary earlier in his career. He and his MCM colleagues succeeded, however, in building a broad base. French and English, Liberals, Conservatives and Péquistes, and left and right all united to help the city move forward. 
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Chart 1: Internet Domain Search, 20 Aug. 2012