TAB is also an acronym for Trendy Asian Bitch. According to http://www.pubnix.org/%7Edoris/whot.html, this is how you can tell if you're a TAB:

1. You shop at Armani Exchange, Bebe, Banana Republic and Club Monaco.
2. You only wear black and will occasionally wear white to "mix it up."
3. You do not weigh more than 105 lbs.
4. You have never paid for dinner at a restaurant in your life.
5. Platform heels are your favorite.
6. You are a makeup expert, in fact, you appear completely flawless.
7. You do not smile in public.
8. You are the object of desire of all Asian men and you know it.
9. You smoke.
10. Your cell phone is completely customized.
11. On the inside flip of your cell phone is a sticker picture of you and your man.
12. Somewhere in your purse is a Sanrio item.
13. You only date Asians, and will only date a boy with a nice car.
14. You are often seen with rice boys.
15. You never travel alone. You are either in the company of other TAB's, or your rice boy boyfriend.

TAB seems to me to be the Asian equivalent of what Jewish people would call a JAP. Calling an Asian girl a JAP, of course, would have its own unique problems, even if she happened to be Jewish.

If you have no clue what a TAB looks like, you should really visit a university in America and see for yourself.