thirteensome

plural thirteensomes

1. rareA group of thirteen people or things.

   So if you have an eightsome, it should be five girls and three guys. A thirteensome should be eight girls and five guys.

   2009, Razorcake, RoseDog Books, →ISBN, page 30

   3 more examples

   Their search through the musical archives of our folk literature has brought to light a “Hawaiian Serf Surf Song,” which they are arranging for a “thirteensome” made up of eleven ukuleles, one mixed voice and a snare drum.

   1916, Musical Courier and Review of Recorded Music, volume 73, page 24

   Sometimes Jim and I would play golf together as part of a thirteensome. Jim would get about 13 guys together, all hitting balls on the same hole at the same time.

   1986, Jerry Greene, “A Young McMahon waits his turn”, in The Orlando Sentinel, (November 9, 1986), p. C-11

   And watch as Loki tried his damnednest to orchestrate a threesome, foursome, possibly thirteensome with his so-called supermodel cunt, and his several cunts amongst the Kensington girls, and maybe, if I'm smart, get a little action myself, from that girl from outside the coffee shop and from the streetcar and[…]

   2012, James Ashton, Le Town Empire, iUniverse, →ISBN, page 173