Green’s Dictionary of Slang

Sir Anthony Blunt n.

also Sir Anthony
[rhy. sl. = cunt n. (4); ult. UK art historian and traitor Anthony Blunt (1907–83)]

a highly objectionable person.

[UK]J. Morton Lowspeak 128: Sir Anthony – a fool.
[UK]R. Puxley Cockney Rabbit.
[UK]B. Dark Dirty Cockney Rhy. Sl.