[dragonwriter]

> What's the difference between a yuppie, a hipster and a millenial?

A "yuppie" is an term of 1980s vintage for "young urban professional", formed directly from the phrase.

A "hipster" is a term of more recent invention, for basically the same thing (a young urban professional).

Both carry some implications of both in-group trendiness and conspicuous consumption though, with the changing character of the times, the "yuppie" has stronger associations with conspicuous consumption and "hipster" with trendiness with less general conspicuous consumption (and perhaps an outward, though often skin deep, rejection of consumerism.)

A millennial is a member of a particular generational cohort, basically the group now between the mid-teens and mid-30s. Modern hipsters/yuppies are probably also millenials, but plenty of millenials are neither.