fiver

plural fivers

1. slangA banknote with a value of five units of currency.

   Do you have a fiver I could borrow? I can pay you back tomorrow.

   2 more examples

   Charming man that—sort I abhor. Makes you feel it must lead up to borrowing a fiver every minute.

   1934, Ernest Bramah [pseudonym; Ernest Brammah Smith], The Bravo of London

   […]a gesture that had a sort of self-parodying wit about it: it was like trying to borrow a fiver, getting turned down, and asking to borrow fifty quid instead.

   1995, Nick Hornby, High Fidelity, London: Victor Gollancz, →ISBN, page 15

2. broadlyslangThe value in money that this represents.

   I bought the chocolates; they were only a fiver.

   1 more example

   ‘When they get there they will have cost me a fiver a beast in transport and fees.’

   1937, Ion L. Idriess, Over the Range, Sydney: Angus and Robertson, published 1947, page 42

3. colloquialA clenched fist.

   Synonyms: bunch of fives

4. A mathematical puzzle played on a 5 × 5 grid.
5. IslamA Zaydi Shiite Muslim, who disagrees with the majority of Shiites on the identity of the Fifth Imam.
6. lifestyleA person who gives five percent of their income or five hours a week of their time to charity (a reduction of ten percent tithing).

plural Fivers

1. IslamA Zaidi Shi'a Muslim.

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

   1998, Emory C. Bogle, Islam: Origin and Belief, University of Texas Press, page 145

   2 more examples

   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.

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

   (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).

   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

2. slanglifestyleA fan of the American science-fiction television series Babylon 5.

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

   1995 June 26, Tiago Joao Silva, “Help fellow Fivers PLEASE!”, in rec.arts.sf.tv.babylon5 (Usenet)

   2 more examples

   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?

   1997 January 30, Alys, “Re: SUNBURN: The Burning Zone”, in aus.tv.x-files (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.

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