Yeah, it seems like an acronym, maybe some internal codename. But for some reason they didn't make it public.. Inappropriate? So... Fuck Anything Slower Than Expected Results? ;)
Microsoft tends to choose bad names: See Visual Studio Code, the most ungooglable name ever.
What are your thoughts on how "Googleable" these product names are: ".NET" and "Azure Functions"
Google makes it work. But then there are C# and F#, which are Googleable but fail on probably 99.9% of other sites and software with search functionality, including some of Microsoft's own products (e.g. NuGet).
A very arrogant name from a very arrogant company...
(Someone should make something faster than faster)