Comes from cockney rhyming English, the street slang of 18 century London crooks. Fancy a look? look rhymes with (butchers) hook.
I've some stereos. Fancy a butchers, me ol china?
by Hermes January 15, 2005
Shortened version of an old Cockney slang term "Fancy a butcher's hook?", meaning " would you like to take a look?"
Allo darlin, fancy a butcher's?
by ams01 January 27, 2005