What is 'the Lady'?
Term used by the general public to refer to a shop assistant of any size, shape, age or gender. Usually used by parents, this term is directed at children who have problems working out what do do with their about-to-be-purchased items, such as toys or sweets.
'I think the ladies would like to shut the shop now' (regardless of whether any men work there or not...)
'Give it to 'the Lady' and then she'll put it in a bag for you'
'That's right, give the money to the Lady'