Glossary/Definitions of everything Yuppie-Related:

Yuppie (noun)

Young Urban Professional, or Young Upwardly Mobile Professional Person. A term created in 1981 by R.C. Longworth, in a Chicago Tribune article entitled Chicago: City on the brink; The social fallout of economic crisis. In that article, he referred to the yuppies living in Lincoln Park. Currently, the term is used as a pejorative, but never on this site.

Yuppie Scum (noun)

Derogatory term for yuppies. Used by liberals, hippies, environmentalists, Marxists, socialists, communists, democrats, slackers, and otherwise unemployed persons. Usually used in the context “Die, Yuppie Scum!”

DINK (adjective)(noun)
Stands for “Dual Income, No Kids”. Refers to a yuppie couple (married or otherwise) that do not have children, nor do they wish to have any. Could be used as a noun (”We are dinks”) if desired.

Hipster (noun)
From Urban Dictionary: People in thier teens to 20s who generally listen to indie rock, hang out in coffee shops, shop at the thrift store and talk about things like books, music, films and art. The modern Bohemians. A mid-twenties person who works at a low paying job, is interested in “Artsy things” - hipsters tend to swarm around the determined “Hipster” part of town, ex. Wicker Park in Chicago. Hipster Ladies should have short hair and wear thrift shop clothes and Male Hipsters should be anemically skinny to let people know that they are poor and cant afford enough food.

Yupster (noun)
Cross between a yuppie and a hipster. Newsweek uses Seth Cohen from The O.C. as an example. Yupsters wear hip clothing, have hip hairstyles, are in their 20s-30s, and listen to indy music.
From Urban Dictionary: yupsters have incorported their edgier pasts into a new form of an extended youth culture of hip clothes, avante rock, indie hop and creative class professions. Yupsters have successfully opened sleek boutique hotels, cool bodegas, retro diner style restaurants, vintage clothing stores, kitschy bric-a-brac retail spaces, tongue-in-cheek bars and lounges, haute hair salons, trendy record stores and labels, hip coffee bars and bakeries, plush pet shops and ironic graphic and design firms. A yupster would deny being a yupster for fear of questioning originality.
A yupster is most likely a yuppie in denial, hiding behind an iPod with songs recommended by Pitchfork Media.