No, it's not "Fuck".
It's not "revert", though that is pretty irritating to read when applied wrongly.
I don't claim to be a word nazi, but I really absolutely go INSANE when I see this word. "Kindly"
Was zum Teufel do people think that word mean?
"Kindly do this."
It always triggers me. People, "kindly" means this:
To me, when a person X use "kindly", it means X is essentially demanding that person Y to do what X wants. Why not just say "do this", because that is what X actually meant? If X intended a polite request, then X should use the word "please".
There is nothing kindly about "kindly".
My lovely modus operandi when I see this in an email request is to make sure I slot that demand to the bottom of my to-do pile. Remember, you asked for it :D