On a Tesla, the standard “PLUGZIN”.
“Mimetic World Model” and “Novum World Model” are fiction genre categories that SF writers and readers sometimes use.
If that’s what it means, it has to rank right up there with “most obscure license plates.”
I have often thought of putting a custom plate on my car that would be meaningful to a small (but non-zero) number of people. For example, I have thought of using the following:
NO KILL I
3MPKWH (on an EV)
PTAAV
LIRPA
But, in the end I settled for one which probably gets mis-identified 90% of the time - BRONKA, which is not meant to be the female of Bronco, but a play on the Tonka toy.
I see this car from time to time and wonder if it’s supposed to be a non-EV joke.
A long time ago on my commute to work in Wichita I saw this plate:
SINEP
Because my brain works in mysterious ways, I immediately spelled it backwards, and I assume that’s what it was meant to be.
I never saw it again, BTW.
Does Kansas require a plate on the front bumper? If the car were behind you, and you saw the plate in your rear-view mirror, that would be the effect.
Millions of people would recognize that instantly. Nothing obscure there.
Same for 3MPKWH. IMO; might be wrong.
Well, I could put MEBES12, but nobody would get that!
Nope, rear plates only in Kansas.
And that would not be the effect, because, although the letters would be in correct order, the letters themselves would be reversed. (I just tried it in a mirror, BTW).
I must say I wouldn’t. So you’re off to a good start! 
I once had a personalized plate on my car. It was the name of my (small) company with almost all the vowels crushed out. By coincidence there were a few more plausible or at least universally recognizable interpretations. Lots of people asked me if it meant [blah blah blah] or [blorg blorg blorg]. Nope; try again.
I’ve been chewing on the idea of getting a personal plate for this car or the next one. But I’m lacking in creativity that won’t make me sound like even more of douche than I already do / act.
Same here in FL. Which reduces the opportunity to play tricks on the plate-issuing bureau. Although you can buy fake look-alike front plates with darn near anything on them.
My first “real” job was as an e-beam lithography engineer, working on MEBES serial #12, in 1983.
As I was heading into the supermarket this morning, I noticed a car with the Indiana plate BOUGHT. No idea what (or who) had been purchased.
PAID4 was taken, maybe?
Yesterday I saw a BMW M-series (I didn’t not exactly which M model). The license plate read 911MGNT.
My initial thought was “911 management”, but after thinking about it for a few seconds I realized it’s probably “911 magnet”, as in Porsche 911. I guess it’s meant to imply that Porsche drivers want to race him.
Today’s sighting was an Indiana plate MOVEDV. I was left wondering how to parse it. MOVE D.V.? MOVED V? Or maybe I should be thinking Roman numerals: MOVE 505? MOVED 5?
I was thinking of a license plate I saw in the '80s. A coworker had a yellow VW Bug (not that that’s important). He was a big Popeye fan. His license plate was AGAGAGA.
A couple days ago I saw a white Caddie or Lincoln SUV. IOW in this environment a classic comfy-class retiree-mobile. The driver and passenger had gray hair
The plate: YLAWAY. As in lazily spending their Golden Years. Made me smile.
Saw one today:
MCMXC
I assume born in 1990.
Or a fan…
A month late…but…
When you’re running from a crime, it is virtually impossible to get that plate right. Like how I always wanted my getaway car to have OQ0QD0
Yesterday I saw one that was YYZ RSH.
The odd part was the plate frame was Jack Skellington from Nightmare Before Christmas. Two competing non-compatible interests, I guess.