HUM-Drums, or Hums,
a Society of Gentlemen, who meet near the Charter-House, or at the King's Head in St. John's Street. Less of Mystery, and more of Pleasantry than the Free Masons.
The Vulgar Tongue originally collected by Grose, 1811.
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).