What does FTM mean on Imessage?

Excuse me, I'm a bit confused about something I saw on Imessage. Could you please help me understand? What does FTM stand for on Imessage? I've seen it used in a few conversations but I'm not quite sure what it means. Is it some sort of slang or abbreviation that's commonly used? I'd really appreciate it if you could clarify this for me. Thanks in advance for your assistance!