Correct me if I'm wrong, but I do believe a hot fuel standby relates to a military aircraft that is refueling shortly after it lands, therefore its engines are still hott. I heard this term used the last time the B-2 was in tulsa doing touch and goes. The aircraft was never on the ground for more than 20 mins in the 2 or 3 hours of evolutions it did, and it always had the ANG fire and Tulsa Fire guys out on the tarmac.