A style of Blues that emerged in the 1940s from an important blues orientation of Big Band and Swing performed by artists like Lionel Hampton, Lucky Millinder, Count Basie and their several bands.
Jump-blues was very popular during the 1940s and 1950s through compositions and performances of Louis Jordan, Wynonie Harris, T-Bone Walker, Big Joe Turner or Roy Brown.
Characteristics of jump-blues are an uptempo, middle size of musical ensemble between usual blues and big band ones, as well as an emphasis on saxophones and brass instruments.
Jump-blues will have been a major precursor musical genre for Rhythm & Blues as well as for Rock & Roll later.