In Walked Bud is a jazz composition by Thelonious Monk, written in 1947 as a tribute to his friend and fellow pianist Bud Powell. The tune is a contrafact, meaning Monk wrote a new melody over the chord changes of Irving Berlin's 1927 popular song Blue Skies. One account of its inspiration traces back to a 1945 incident at the Savoy Ballroom, where Powell reportedly came to Monk's defense during a police raid, though the details of this story have been told in conflicting versions over the years. Monk first recorded the piece during his 1947 Blue Note sessions, which were later compiled on the album Genius of Modern Music. The melody is characteristically Monk: angular, rhythmically unpredictable, and full of the harmonic quirks and dissonant surprises that define his compositional voice. It has a rollicking, uptempo swing feel that gives it an energetic, playful character, yet the angular leaps and unexpected accents in the melody line set it apart from smoother swing-era writing. Monk returned to the composition multiple times throughout his career, including on the acclaimed 1958 live album Misterioso, which features a celebrated tenor saxophone solo by Johnny Griffin, and on 1968's Underground, where Jon Hendricks contributed a vocalese version with lyrics. In Walked Bud has become a widely performed jazz standard, frequently covered by artists across a range of styles and a staple of jazz education, representing one of the clearest examples of the contrafact tradition in the bebop era.