A "Rap Duo" refers to a musical group consisting of two artists who collaborate to create and perform rap music. This partnership allows them to combine their unique styles, voices, and lyrical skills, often resulting in dynamic and engaging performances. Rap duos can explore various themes and genres, making their music appealing to a wide audience. Some well-known examples of rap duos include OutKast, consisting of André 3000 and Big Boi, and Mobb Deep, featuring Prodigy and Havoc. These duos have made significant contributions to the hip-hop genre, showcasing the power of collaboration in music.