Yuppie comes from Young Urban Professional, sounds simple enough.
Hippies are pot smoking communists who hate meat, never shower and sleep in trees.
Yippie comes from Youth International Party, thought to be the combination of the 2 above.
Hipster is the new emo kid who decided suicide isn’t for him.
Yipster, could either come from Yuppie + Hipster, or Yippie + hipster, or Yippie + hustler.
I copied this from wikipedia since the writing is so poor (and I could’ve written it worse)
Yipster is a terminological hybrid of the words, “Hipster” and “Yuppie” borne out of the geographical and cultural proximities between two gentrified neighborhoods in Brooklyn, New York: Williamsburg and Park Slope. The word’s significance is based around the idea that cultural features associated with “hipsters” (Williamsburg), such as particular interests in music, art and fashion, blend with the economic advantages of “Yuppies” (Park Slope), which simultaneously facilitate and promote such interests to the extent that members of both groups are identified by them. Although a significant amount of animosity and a number of cultural prejudices are shared between both two social groups and neighborhoods,  the social strata of the people who populate them are, in terms of race and class, more alike than they are different.
Although many in Brooklyn claim to have coined the term , Yipster, there is evidence the term was in use on the west coast, most notably, Los Angeles and East Hollywood, as early as 1984, which would predate its use on the east coast by almost ten years.
Although many West Coast Yipsters, most notably those from Los Angeles and East Hollywood, feel a kind of pop-cultural inferiority complex to Brooklyn yipsters (as evidenced by the preceding amendment to this entry) the whole subgroup should be found wanting. The problem lies not with their tastes in music, local foodstuffs, artisanal fabrication, or even hypocrisy (which the name Yipster insinuates). The problem is the rotten false consciousness at the group’s core. Such Ideological masking is propped up by a solipsistic turning away from Real politics toward the chimera of coolhunting and “personal development”, which is, in turn, an insidious and defacto surrender to the precise forces most at odds with many hipster ideals (e.g. local, hand made, fair trade, made in earnest with passion and originality etc).