Shepherds, Shake Off Your Drowsy Sleep is a popular Christmas carol with the words by English poet Laurence Housman and the music by Betsy E. Bailey. It was first published in 1894. The lyrics are often set to a familiar traditional melody and titled as “The Mummer’s Song” (or just “Mummers”); the tune is also popularly known as “Twankydillo”.
As Betsy Bailey – Shepherds Shake Off Your Drowsy Sleep Piano Sheet Music has been published since 1894, it is important to realize that this song was written in the late 19th century. This means that it would have been written at the time when the word “mum” was used to simply mean “clothing or covering”.