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Gentrification; i.e., the displacement of lower-class residents of a neighborhood (esp. one located in or near the center of a large city) by upper-class residents (a back-formation of "putrefaction;" used contemptuously by the phenomenon's detractors)
Some long-time residents of San Francisco's Mission District have taken to vandalizing the cars of "yuppies" to protest the ongoing "gentrefaction" of their neighborhood.
by Anthony Brancato February 19, 2005