Fiver

From five +‎ -er (“supporter”) or +‎ -er (occupational suffix).

Fiver (plural Fivers)

1. (Islam) A Zaidi Shi'a Muslim.
   • 1998, Emory C. Bogle, Islam: Origin and Belief, University of Texas Press, page 145:

     The three major branches or sects are the Twelvers, Seveners, and Fivers.

   • 2007, Daniel McLaughlin, Yemen: The Bradt Travel Guide, Bradt, page 23:

     Whereas the largest Shi’a branch, the ‘Twelvers’, strictly believe that there were only 12 visible imams, the ’Fivers’ have recognised many more imams throughout their history.

   • J. E. Peterson, Yemen on the precipice: Governing the ungovernable in 2013, Abbas Kadhim, Governance in the Middle East and North Africa: A Handbook, Routledge International Handbooks, page 306:

     (the Zaydis, or Fivers, were the first subset to break away from larger Shi’ism, and traditionally elected an imam from among the descendants of the Prophet Muhammad as their leader).

2. (fandom slang) A fan of the American science-fiction television series Babylon 5.
   • 1995 June 26, Tiago Joao Silva, “Help fellow Fivers PLEASE!”, in rec.arts.sf.tv.babylon5‎^[1] (Usenet):

     It is more than two weeks that Babylon 5 aired for the last time. We, Portuguese Fivers of conviction, are few.

   • 1997 January 30, Alys, “Re: SUNBURN: The Burning Zone”, in aus.tv.x-files‎^[2] (Usenet):

     Did all the Fivers who watched it notice that the female scientist (DrWhatshername) was played by Tamlyn Tomita, the actress who played Lt. Cmdr. Laurel Takashima in Babylon 5's pilot movie?

   • 2001 September 25, Steve Garrett Jr., “Re: The breen: total ripoffs of Star Wars”, in alt.startrek.vs.starwars‎^[3] (Usenet):

     I've had hardcore Fivers point to both Jadzia Dax AND Kira as ripoffs of Ivanova (they can't decide which, I suppose) despite the fact that both premiered on DS9 first, and JMS didn't get rid of Ivanova until AFTER The Gathering, which showed when DS9 first came around.

• Twelver
• Sevener