Abbreviation for Fake Mass Text, in which you pretend to be sending a mass text but in reality you are only sending it to one person. Often, because you are too embarrassed to text this person on an individual basis, and you have already sent your real friends normal text messages.
Jason ignored Sarah because he thought she was a major stalker until she sent only him an FMT saying "hey everyone, meet me at Señor Frog's!" and he bought it. Once he got there, he was reminded of how FINE she was, and they promptly proceeded to get busy. Another successful FMT.