Racionais MC's are a Brazilian hip hop group formed in São Paulo, widely recognized for their influential role in Brazilian rap and urban music since the late 1980s and early 1990s. Their music blends hardcore and boom-bap hip hop styles with strong influences from funk and soul sampling, characterized by dense, rhythmically driven beats and incisive, narrative lyrical delivery in Portuguese. The group's songs frequently address social issues such as racial inequality, police violence, poverty and life in São Paulo's peripheries, delivered through vivid storytelling, spoken-word cadences and collective vocal interplay. Known for a raw, uncompromising aesthetic and a focus on social realism, Racionais MC's have been a central voice in Brazil's cultural and musical discourse.