Wynder K. Frog is a British rhythm and blues band, active primarily during the late 1960s. Led by keyboardist Mick Weaver, the band was known for its soulful Hammond organ-driven sound. Their 1966 cover of "Jumpin' Jack Flash" gained considerable popularity, showcasing their signature blend of blues, soul, and early rock. Despite a short-lived career, Wynder K. Frog's unique style and Weaver's distinctive organ playing left a lasting impression on the British rhythm and blues scene.