Other forms: yuppies
If your brother calls you a yuppie, it's not a compliment, but it does mean that he sees you as a well-paid, professional adult.
In the mid-1980's, people started using the derogatory term yuppie to talk about a particular group of middle-class, well-educated workers. Yuppies are distinguished by their disposable income and the things on which they choose to spend it, like clothes, food, and cars. Yuppie is a shortened form of "young urban professional," and its popularity won out over other acronyms of the time, "yumpie," for "young upwardly mobile professional, and "yap," for "young aspiring professional."