I do a lot of teaching and consulting on different aspects of clinical documentation and also review lots of records in different contexts (forensic, chart reviews, second opinions etc) and my recommendation is to describe the behavior, statements, delusions etc, rather than abbreviate using short hand. Not just because that language may be pejorative, but also because it is often unhelpful to any future readers.
So rather than "patient is paranoid"it is better to put "patient reported he was being followed, stalked, microchipped"
Rather than patient is "manipulative" it is better to put "patient stated if discharge he would write in his suicide note how unhelpful I had been and that I would still be alive if I had admitted him" or "patient threatened to sue if not provided with a private room" etc. Using quotations from patient is golden, hard to object to, and livens up the notes.
I do not recommend using the term "malingering" unless you are 100% certain. Even as a forensic psychiatrist, I do not often use the term malingering. Instead, I might put something like "patient did not appear to be accurately reporting psychiatric symptoms given inconsistencies between subject reports and objective finding on MSE, inconsistent contradictory statements made, contradictory collateral, behavior when he did not think he was being observed, and record review noting a history of feigning psychiatric symptoms."
If you think the patient is faking it - feigning is better than malingering which implies you know why they are feigning (which you may or may not).
I think it is okay to report that they have a "history of multiple ED visits". The term "frequent flier" is not recommended, and "high utilizer of services" is also not recommended. Some people use the term "familiar face" but honestly, that seems a bit ridiculous to me. I would usually put "patient is well known to me and my team".
While in medicine we tend to use shorthand, sometimes it is much better to just document what the patient said or did rather than try to summarize it into a pithy and likely disparaging epithet. Much harder for the patient to be offended or argue with a dispassionate account of what transcribed in the clinical encounter. Finally, remember you cannot please everyone all of the time. We still need to be honest in our documentation, even if patients are unhappy about it.