"Stop Messin' Round" is a song first recorded by English blues rock group Fleetwood Mac in 1968. It was written by the group's principal guitarist and singer Peter Green, with an additional credit for manager C.G. Adams. The song is an upbeat 12-bar blues shuffle and is representative of the group's early repertoire of conventional electric blues. The lyrics deal with the common blues theme of the unfaithful lover and share elements with earlier songs.