[thebruce87m]

“Fud” means something very different in Scotland. It used to be a common derogatory term.

https://en.m.wiktionary.org/wiki/fud

[m463]

It was also used microsoft to great effect.

https://en.wikipedia.org/wiki/Fear,_uncertainty,_and_doubt

[unethical_ban]

Looks like it is related to futz, how I have heard it "don't futz around with that" with kind of means don't like at it because you'll break it.