Mervyn "Muff" Winwood is a British songwriter and record producer, and the elder brother of Steve Winwood. Both were members of the Spencer Davis Group in the 1960s, in which Muff Winwood played bass guitar. Following his departure from the group he became an A&R man and record producer.

"Gimme Some Lovin'" is a song first recorded by the Spencer Davis Group. Released as a single in 1966, it reached the Top 10 of the record charts in several countries. Later, Rolling Stone included the song on its list of the 500 Greatest Songs.