What does this keyword mean?

Ali "The Metallian" Ghaemi is a musician of some kind I believe, and all famous persons should be listed as "reference to" when they are mentioned by name in the script, or a written or photo reference is seen on screen.  For example, if a poster of Albert Einstein is seen on a character's bedroom wall, or if a character says "what are you, some kind of Albert Einstein?" to another character, either the poster or the mention would be a reference to Albert Einstein.  In this case, it would seem that Ali "The Metallian" Ghaemi was referenced similarly in a film.  The only possible issue with the keyword format is whether the quotation marks should be there or not.  As a bad example, it would be incorrect to add "reference to john 'the duke' wayne" or "reference to john 'duke' wayne" since he is not usually referred to that way, and never was on screen.  So "reference to john wayne" would be correct.  On the other hand if "the metallian" is how ghaemi is always referred to, then that would be correct.  As a better example "reference to joe 'the president' biden" would be incorrect, but "reference to president joe biden" or "reference to president biden" or "reference to joe biden" are each potentially correct, depending what the on screen reference actually is, although generally "reference to joe biden" is preferred in most cases.  As far as what makes a keyword valid, any potential keyword is valid, as long as it is seen, heard, talked about, or the subject matter of what is on screen, whether it is a popular keyword, such as "the white house," or if it is a new or obscure keyword, such as the one you asked about, it can be a valid keyword.  New keywords are just added to the database by filling in a bubble marked "add this keyword," and the next time someone wants to use the same keyword, it will no longer be new, and the IMDb server will recognize it as a keyword already in use on other titles, immediately accepting it for the title it is being entered for, without requiring filling in a bubble to add this keyword.  I hope I've explained it clearly enough for those of you who do not have experience with keywords as of yet.

By the way, although obscure to me, it might not be to others, but for anyone who might be interested in where I found out about Ali "The Metallian" Ghaemi, check this link: https://www.discogs.com/artist/3436726-Ali-Ghaemi

I agree.  This seems like a troll promoting something, or someone, but I don't know what, or who. It just seems ludicrous that this is a name "seen, heard, talked about, or the subject matter of what is on screen," especially when one looks at the 374 titles to which it is affixed.

Thanks for the responses.  And, IMDb staff, please investigate.

To me, it seems like this keyword should be deleted, and then banned from further infiltration into the database.  I suspect that someone "is up to no good!"

By the way, this problem is NOT solved.  How do I "unsolved" it?

Interesting, I did not look it up that way, I was just replying to the methods and normal keyword additions.  I did not think that someone would be trolling in that way, it actually never occurred to me.  In general, except for the trolling, what I outlined is correct, or do you disagree with that too?

Yes, I agree with you.  What you correctly elucidated are things that I already knew, since I do a lot of work on keywords.  It just seems that this one is very strange and needs some staff attention.

(It may be connected with the problem concerning the unacceptable addition of the racist "almond-eyes" keyword, which I have been working to delete.)

The IMDb staff does not get keywords right a lot.  They allow stuff (a few) they should not, and do not allow stuff (a lot) they should (or they study it for days), such as the keyword "queer cinema."  They treat the use of the word queer as if it was still 1980.  Now queer is a catch all for LGBT culture.  So, they always make it pending for two or three days, and then sometimes they approve it, and other times they do not.  They do the same thing for "masturbation" and "porn magazine" and several others.  If a movie has a masturbation scene, that word is appropriate for non-porn movies, such as one of those stereotypical scenes where a kid is masturbating under the covers and his mother comes in without knocking.  If a movie has teens looking at porn magazines and trading them for their collections, then porn magazine is an appropriate keyword.  It is really irritating when they turn down a keyword that you know is topical for that movie.  If a movie is about gay people, or lesbians, or trans people, and they are central characters, then queer cinema is an appropriate keyword, especially as an umbrella term, in my opinion.

I keep seeing this keyword in connection with the sexually subjective keywords like "legs-to-die-for," "exquisite-legs," "creamy-legs," "sexy-thighs," "doable," etc.

Maybe Ali "The Metallian" Ghaemi is the troll responsible for these keywords and he is spamming keywords to promote himself, like leaving graffiti? Or maybe someone wants IMDb to think it's him? 

Very strong possibility.  I hope IMDb is listening.

And what about if people start describing black people as "N-people?"  And Jewish people as "K's?"  How about if they describe white people as "Whitey" or "H-people?"  How about Mexican people as "W-back?" And Native Americans as "R-skins?"  Those are all descriptive words for those kinds of people, and they are all BAD!  If the words you use ANNOY people, and especially if you are just doing it because you want to annoy people, then frankly, maybe you should not be here.  And for the record, I am one of those Jewish "K's," so get a grip!