NGAD COMING IN 2024! - Latest Program Updates 

Yes, I have heard it called that in the past, but U.S. Air Force officials have been publicly referring to it as the NGAD lately.

F-X was one of the early designations of the manned NGAD fighter but seems to have fallen out of favor with USAF officials who have referred to it multiple times recently as the NGAD. The "Flying Dorito" nickname belonged to the cancelled McDonnell Douglas/General Dynamics A-12 Avenger II.

Hopefully, they've learned their lessons from the theft of F-35 design information.