DOMERARS, or DROMMERARS,
Rogues, pretending to have had their Tongues cut out, or to be born Dumb and Deaf, who artificially turn their Tip of their Tongues into their Throat, and with a Stick making it bleed.
The Vulgar Tongue originally collected by Grose, 1811.
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).