Hip-hop, rap music or hip-hop music is a musical genre characterized by a rhythm accompanied by rap and song. The genre developed as a cultural and artistic movement in the United States, New York, the South Bronx in the early 1970s. Originally from the black and Latino ghettos of New York, it quickly spread throughout the country and then the world to the point of becoming an important urban culture. Hip-hop culture has several disciplines: rap (or MCing), DJing, break dancing (or b-boying), graffiti, beatboxing. These disciplines, which appeared before hip-hop, will be integrated from the very beginning of the movement. However, it is through his musical expression that he is best known and, as a result, often reduced to it.
This musical expression is itself often called rap, which is a shortcut because it only applies to the chanted and jerky speech specific to MCing. Hip-hop music can take many forms, even being limited to DJ (disc jockey) beats, in which case the term rap is not appropriate.
Hip-hop new school refers to the second wave of hip-hop, which emerged between 1983 and 1984 with songs by groups such as Run-D.M.C. and LL Cool J. The golden age of hip-hop refers to a period of innovation anchored in the mid-1980s and early 1990s. Notable groups and artists of this period include Juice Crew, Public Enemy, Eric B. and Rakim, Boogie Down Productions and KRS-One, EPMD, Slick Rick, Beastie Boys, Kool G Rap, Big Daddy Kane, Ultramagnetic MCs, De La Soul, and A Tribe Called Quest, respectively. Rap gangsta is a sub-gender of hip-hop that most often focuses on violent lifestyles and conditions of misery among African-American youth. Schoolly D, N.W.A, Ice-T, Ice-T, Ice Cube, and Geto Boys are the key groups and artists, known to mix social and political words from political rap with stories of criminals common in rap gangsta.