Noun.
Informal for the acronym (Y)oung (U)rban (P)rofessional, or the longer version of Yup. Someone of a particularly young age (13-30) who has either a well paying job or very high allowance, and is seen often going to Starbucks, having rewards programs for certain businesses, shops at nice places like CATO, or things of that nature. They also prefer food that is not "OMG I can't afford that" but food that is "well, I can afford it but it's a little on the pricey side". Not necessarily a bad thing, but some Yuppies will flaunt their privalged life a little to much. Other than that, they're just live everyone else.
Hah, look at all the little yuppies at that Starbucks with their parents. That one over there, he's even paying for his own drink.
Literally (y)oung (u)rban (p)rofessionals, but usually refers to recent college graduates from middle- to upper-class strata grappling with the experiences of beginning to climb the career ladder and trying to date or get laid in the little time they aren't working. General attributes include: making more money than they know what to do with, attempting to find a work-life balance by buying expensive gym memberships and equipment to begin hobbies that will later be abandoned, getting a dog, completing apartments with Ikea furniture, using dating apps where they post pictures of themselves with their dogs (and proclaim they are interested in others' dogs), having pictures taken of themselves on hikes and other routine outdoor activities, discussing experiences of adulting, starting to do yoga, going to happy hours, drinking fancy lates in the morning, and traveling to europe to take cliche photos of themselves next to famous monuments.
"Man, buying that expensive new pasta maker was such a yuppie thing to do."
"What do yuppies like me do with their time anyways?"