Fuckboy/fuckgirl.

Yeah, that’s the insult.

Basically, what it amounts to is dishonest game playing in order to get sex/romance/attention.

The ethically non-monogamous among us don’t qualify for this put-down. They let you know from the get-go that monogamy-minded people are incompatible and don’t pursue sex/romance/relationships with them in the hope they might change their mind.

They’re the very model of principled, self aware, and mature consent.

So no sex shaming them, thank you very much.