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1 definition by Cabatian

Hyphy (pronounced high-fee; IPA: ˈhaɪfi¢°]) is a style of music and dance associated with San Francisco Bay Area hip hop culture. It began to emerge in early 2000 as a response from Bay Area rappers against commercial hip hop for not acknowledging the Bay for setting trends in the hip hop industry.1 Although the "hyphy movement" has just recently seen light in mainstream America, it has been a long standing and evolving culture in the Bay Area. The term is a combination of the words "hype" and "fly".2
It is distinguished by gritty, pounding rhythms, and in this sense can be associated with the Bay as crunk music is to the South. An individual is said to "get hyphy" when they act or dance in an overstated and ridiculous manner. Many in the Bay Area would describe this as acting "Retarded", "Riding The Yellow Bus", "Stupid" or "Going Dumb".
by Cabatian June 05, 2006