"Mannish Boy" is a classic blues song written and performed by Muddy Waters. Released in 1955, it features a strong, driving rhythm and powerful vocals that showcase Waters' signature style. The song is known for its catchy refrain and themes of masculinity and confidence, making it a staple in the blues genre. The track has been covered by many artists, including Jimi Hendrix and The Rolling Stones, further solidifying its influence in rock and blues music. "Mannish Boy" is often celebrated for its raw energy and has become a defining piece of Chicago blues history.