Well, if I have to spell it out... you'll know I don't know what it stands for. But, basically FAR restrictions associated with long haul flying. (Not really even FAR restrictions but more like a self-imposed agreement with the FAA to fly long trips not covered by the FARs. UAL/AMR doesn't do what we do.) For example, every JNB trip requires you to have 3 nights without flying before you can go out again and 24 hrs off before the trip. So, a 5-day trip has a 8/9 day footprint on your schedule. FRMS might mean Freaking Ridiculous Monkey Shxx or something like that.