I don't think "threeb" will become part of the language until people start using it in a generic way: "She's a real threeb, wouldn't you say?" But this may never happen, because you're totally unique, Threeb. (I do mean that in a nice way!)
As regards the speech habits of some residents of NYC and Noo Joizy, unless I'm mistaken, that vowel sound in skirt is very similar to the way some Australians say a long E, as in beef. There's a TV comedy show called Kath and Kim that sends up an Australian suburban family, and one of its catch-phrases is "Look at me!" (Said in a stern mother's voice). When people try to write down the phrase, as the character pronounces it, they write "Look at moy!", which isn't quite right, but probably the best you can do without using special phonetics symbols. Anyhow, it seems to me to be much the same sound as in the New York "skoit".
