Just in the last few weeks, I’ve seen Ohio license plates saying WHYIOTA (on the car of a Three Stooges fan, presumably) and NI (Monty Python). How about you?
Just saw this the other day.
JT(heart)SDMB 
10S NE1
Si
Recent: NORO LIM
Old favourite: COWTPN
On a fuchsia Civic, with a Hello Kitty shade: 6RLYRYDE. (Warning! Old thread!)
Damn it. Would you people translate these things please for the idiots like myself. I never understand these threads. 
In other news… I read somewhere (prob. SDMB) about the plate “hondium” on a Honda Element.
The other day I was behind a car that had BLKN PRD plates. I instantly thought “Hey, that must be one of the Belkins.” Belkin Productions is a company that at one time owned half of the music venues in NE Ohio and put on just about every concert.
I followed the car for a bit (not stalking - they were going where I was going, in traffic) and as I got closer I realized it was a rather shitty car. I was soooo curious why one of the Belkins would be driving around in it. Then I was equally stunned that there was a young black woman driving it (the Belkins are rich, rich white guys).
Turns out it didn’t say “Belkin Productions” at all. BLK N PRD was “Black and Proud” 
My wife’s stepdad has a really quite nice Chevy SSR, which he loves muchly. Recently he ordered a vanity plate for it. The way it works here is, you fill out a form with three choices as to what you want, and they’ll give you whichever one is available, supposedly in your order of preference.
Unfortunately, he didn’t get either of my suggestions, although they were his #1 and #2 choices. They were:
ES ES AR
and
U NV ME
WHYIOTA – The Three Stooges are famous for saying “Why, I oughta (punch your lights out, smack you, whatever)!”
NI – A Monty Python sketch features the line "We are the knights who say Ni."
10S NE1 – Tennis, anyone?
COWTPN – Cow tipping
U NV ME – You envy me
ES ES AR – My guess is that it refers to the letters “SSR”, but I’m not sure why. Initials? A nostalgia for the old Soviet Socialist Republics?
Can’t help you with the others mentioned through Max Torque’s post.
One plate I remember: On a Shelby Cobra cruising the New Jersey Turnpike at a speed well above the posted limit – POISNUS (the cobra is a poisonous snake).
My favorite will always be the non-vanity A55 (orange)RGY
EZ2XLR8 on a Ferrari in South Florida.
VCNJ~
CUZICUD ("'cause I could"), on a Porsche
FUZ MGNT (“Fuzz Magnet”) on a red sporty car
IEFBR14 (old time IBM mainframers will recognize this one; basically it’s a null placeholder program that can be referenced in JCL).
OBN OHNE (think that was the spelling) on a convertible. I thought nothing of it - but a German-speaking carpooler riding with me started cracking up. Apparently it’s a contraction of “topless”.
On a Nissan 300ZX - “ZEXXXY”.
I posted this once before, but my favorite I have ever seen was on a motorcycle (Harley).
KLTLKR
I wont translate, it should become obvious if you think about it for a few seconds.
Fry
6RLYRYDE – the 6 is a “G”.
A friend of ours has
4KNMYI
I kinda like that one, although it makes me want to pull the fork out.
Daniel
Legend: PLATE (translation)
4COUGH (fork off ~ fuck off)
CME2P (see me to pee) This one was allegedly on a car owned by a urologist.
IMDBOSS (I’m D Boss ~ I’m the boss)
XQQQQME (Excuse Me)
bravest guy I ever saw had a plate that said FEMGUY
I saw a variation of this that read:
NE1 4 10S
I hope no one here needs a translation of NORO LIM!
We are all Tolkien geeks of one level or another, right?
Right?