I'm looking for a translation of the phrase which is the profane version of this phrase:

"F--- you, you Porsche motherf---ers!"

Actually, my twin brother is looking for this translation, for a racing car he's building. Ideally the translation would be short, since he's going to cover up the license plate with this. Could drop the second "you".

If anyone is sure enough of their Japanese to put it on a fast car, please let me know! (You can email it to me if you don't want to swear in Japanese on a public forum.)

I asked my wife and there isn't a direct translation. The closest thing (that I think resembles it) might be くそやろう.　

kuso means poop
yarou is used for people you don't like

I would love to see the car when it is done. I assume it is a Japanese racing car.

Am I the only one here who would love to know the story behind this?

Thanks guys. I was sent an email with some suggestions that seemed suitably aggressive.

My bro often builds out racing cars for guys who want to go really fast. This one is a Miata that used to say "No Fear" in Japanese (I forget, but it was just two kanji). The owner is a member of the Porsche Club of America, but he's the only one of his friends in it that doesn't drive a Porsche, and they rag him for it, so after this rebuild, he wants to destroy them on the track. I presume that he expects that they'll be behind him reading his license plate, and they'll ask him what it says after their destruction, and he'll have his snap.

How about "ポルシェくたばれ!"? "Kutabare" isn't very translatable, but is extremely rude, with the intent of "drop dead, go to hell, shove it".