Slutzone

A metaphorical location in which one is placed when judged as only suitable for disposable sexual activity by a romantic interest.

See also: Friendzone

"I was really hoping Marco would call me back after that amazing night, but I think I've been slutzoned."

Slutzoned

Friend with benefit zoned or zoned out as a lover or fling.

Damn the other day I got slutzoned by Ryan... I thought there was something there