Culture, Nomenclature 
“I said a hip, hop, the hippy, the hippy, to the hip-hip-hop and you don’t stop.”
Polaroid Portrait of Dj Kool Herc in the Mid-1970S at Stafford's Place Club, University Avenue, Bronx, NY
"This summer marks a vital anniversary in the history of American music. Fifty years ago, on Aug. 11, 1973, a Jamaican-born DJ named Kool Herc helped his sister throw a back-to-school party in the community room at their apartment building in the South Bronx. There, Herc came up with an innovative approach on the turntables that allowed him to isolate and repeat the musical breaks on records that got people dancing. Over those breaks, he and a friend, Coke La Rock, added another innovation: the rhythmic vocal delivery of rapping. That unique combination of DJ’ing and emceeing is widely credited as the baptismal moment of hip-hop." - Ben Zimmer

Article: How Hip-Hop Got Its Name