I think it was Jasper Carrot who talked about a Brit living in the States who had the plate B*LLOCKS. Apparently it is not a word commonly used in the States, lol 🙂
I know of one guy working in IT, who has actually the license plate 98-NT-XP. Mind you, in Holland, you can't order a custom one, he had to wait until this one was next in the series.