singletail

plural singletails

1. A variety of goldfish with an undivided tail.
2. BDSMA whip with a single lash.

   Stopping her tapping, Angelica belted the singletail, and grasped Allison's lead pulling her tits up sharply to render her helpless.

   2008, Jennifer Campbell, Allison's Training, page 110

   1 more example

   Velvet also whips him, beats him and torments his cock and balls (by kicking, squeezing or the judicious use of a singletail whip) on a regular basis — as often as he needs and wants, but at least several times a week.

   1999, Katharine Gates, Deviant Desires: Incredibly Strange Sex