A phrase to show enthusiastic agreement for anything lit enough to apply, a greater version of the term "yup". It can also work as a greeting on some occasions to express enthusiasm.
Liam: "Hey Mark? Can Ihave one of your apples?"
Mark: "Yuppa."
Liam: "Yuppa!"
(noun): A genre of stereotype that is usually a young suburban white male. A devolution of a yuppie and a hipster. Can be characterized by the wearing of their sisters pants, v-neck shirts, 40 year-old lesbian haircut and ironic eyewear. Listens to music too cool for you on University independent radio. Babbles about the environment and being a vegan, as if anybody gives a shit. WARNING: Adhering to the yuppster ways is hazardous to your health . Loss of testosterone due to tight pants and frequent neck problems from constantly jerking your head back to get your bangs out of your face.
Chase: Did you meet the new guy chris?
Clint: You mean the guy who is wearing his sisters clothes whilst having a dinner plate in his ear, like he's on the cover of national geographic?
Chase: Ooohh yeah, total yuppster.
Clint: Man, id love to kick that guy in the nuts!