kinky

1. (informal) Marked by unconventional sexual preferences or behavior, as fetishism, sadomasochism, and other sexual practices.Examples: "What had I been expecting, behind that closed door, the first time? At the very least some minor sexual manipulation, some bygone peccadillo now denied him, prohibited by law and punishable by amputation. To be asked to play Scrabble, instead, as if we were an old married couple, or two children, seemed kinky in the extreme, a violation in its own way."; "Their male customers are often identified as lonely, sleazy, and into kinky sex[…]"; "Scars on my back were revealed from when I was whipped by a sadomasochistic ex-lover. I wondered if it bothered anyone, but it only seemed to make everyone harder than they already were. I was a kinky girl."informal