"'A sovereign, for a suck or for a Robert' - he meant, of course, a Robert Browning"

A sovereign is a gold coin which traditionally had the value of £1 sterling.

There is no mention of what Robert Browning, or Robert, is slang for in any of the dictionaries named below.

Robert Browning, the poet, famously used the word twat in a poem entitled Pippa Passes, mistakenly thinking that it was part of a nun's habit (not that this throws any light on the present question).


Dictionary of Victorian sexual slang

Dictionary of the Vulgar Tongue (1811)

Cockney Rhyming Slang

Taboo Cockney Rhyming Slang