Conan Doyle, n. — Green’s Dictionary of Slang

Conan Doyle n.

also Jack Doyle

[rhy. sl.; ult. Sir Arthur Conan Doyle (1859–1930), novelist and creator of Sherlock Holmes; Jack is just used generically]

a boil (on the neck).

1960		J. Franklyn Dict. of Rhy. Sl.
1976		(ref. to 1930s–70s) R. Barnes Coronation Cups and Jam Jars.
1981		P. Wright Cockney Dialect and Sl. 105: Conan Doyle ‘boil’.
1998		R. Puxley Fresh Rabbit 57: Jack Doyle Boil.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.