Citations:Oncer

Noun: "(fandom slang) a fan of the American television series Once Upon a Time"

 * 2013, Hiko Mitsuzuka, "Charmed & Generous: Josh Dallas", Bello, Issue 47, June 2013, page 14:
 * And fun because, well, he gets to interact with “Oncers” at fan events like PaleyFest and Comic Con
 * 2014, Leena Tailor, "Rose McIver: Her own fairy tale", The New Zealand Herald, 8 February 2014:
 * The hype continued, leading up to her first appearance on the show, with ABC launching a huge social media campaign which saw "Oncers" around the US tweeting #TinkerBell in the week before her grand, glittery entrance.
 * 2014, Matthew Hoekstra, "Once draws super fans to Steveston", The Richmond Review, 21 March 2014, page 1 (image caption):
 * Katy Lewis, a resident of Whitehorse, Yukon, is a 'Oncer'—a super fan of the popular TV show Once Upon a Time.
 * 2014, "@team_OUAT", Fandoms Assemble, October 2014, page 9:
 * We are all so passionate about Once Upon A Time all year round and I wanted to interact with other Oncers.
 * 2015, Carolynne Palla, "Publisher's Note", Steveston Insider, August - September 2015, page 2:
 * Once Upon A Time has put Steveston on the international map and we welcome all of the fans, known as "Oncers," to our village.
 * 2015, "Contents", Richmond News, 2 October 2015, page A3:
 * A horde of 'Oncers' from all over the continent are descending on little Steveston/Storybrooke this weekend.
 * 2016, Graeme Wood, "Oncers bask in selfie stardom", Richmond News, 24 February 2016, page 1
 * 2018, Alan Campbell, "OUAT is no more", Richmond News, 15 February 2018, page A28:
 * At its peak, OUAT, shown on CTV in Canada, was so popular that "Oncers," as the fans were called, travelled from all over the world to experience Steveston and explore the stores used for filming.