Telling ATC you have an engine fault is pretty pointless. They won't know what to do with the comment. The word we're poking fun at gets the message across in a very clear manner indeed.
Yep, sure does. I also work in a place that has the potential to kill people if things go pear shaped. Sometimes nasty words convey the difference between "Would you mind if I do X" and "This is what's GOING to happen"