Jigger

Hi,

I am researching the use of the word 'jigger' (Liverpool slang for an alleyway) for a university English language project and wondered if you could give me any details, or suggest any people or books that may be able to help me?

I'm especially interested in how old the word is and its orgins, such as what language it came from or other word it developed from.

Kind regards,

Tony Bethel