Dictionary.com
Thesaurus.com

kinkster

American  
[kingk-ster] / ˈkɪŋk stər /

noun

Slang.
  1. a person who participates in unconventional sexual practices, especially BDSM.


Etymology

Origin of kinkster

First recorded in 1895–1900, for an earlier sense; 1965–70, for the current sense; kink ( def. ) + -ster ( def. )