What is CF in Grindr?

Could you please clarify what "CF" stands for in Grindr? I've been noticing it mentioned quite often but haven't quite figured out its exact meaning. Is it related to some specific feature of the app or a community within Grindr? I'm quite curious to know more about it. Could you possibly provide some context or examples where CF is used? I'd really appreciate it if you could shed some light on this matter.