well by medical standards charts for heighth and weight proportion. Adult women should weigh approximately 100 lbs for the first five feet in heighth and five lbs for every inch there after. Now some people can be more or less in terms of their frame Sm, Med or Large. But practically speaking a women at 5'4" should weigh about 120lbs. You say you weigh 150 well thats 30 lbs over weight but taken in consideration that you probably posess a large frame and you are considerably busty it would depend on how well you carry your weight and how you actually look before I would say you are a BBW which of course isn't a medical term but medical professionals might sugest you drop some weight regardless. You say your bust size is 36G thats incredible for a girl your heighth. Hows your back? Anyway in this forum your health isn't that much of a concern by members its your hotness factor. If you look hot with those big knockers and your midsection is relatively flat I wouldn't think it would be fair to catagorize you as a BBW. So if you don't think you're a BBW then dress to stream line your midsection which means lift your bust. Busty women can look fat.