"Mannish Boy" (or "Manish Boy" as it was first labeled) is a #bluesStandard written by #MuddyWaters, #MelLondon, and #BoDiddley (with Waters and Diddley being credited under their birth names). First recorded in 1955 by Waters, it serves as an "#answerSong" to Bo Diddley's "#ImAMan", which was in turn inspired by Waters' and #WillieDixon's "#HoochieCoochieMan". "Mannish Boy" features a repeating #stoptime figure on one chord throughout the song.
https://www.youtube.com/watch?v=2QoBR-F3tp4
Muddy Waters - Mannish Boy (Live)

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