who are you and what have you done with someone

Meaning

who are you and what have you done with (someone)?

(colloquial, rhetorical question) Said to express surprise due to a perceived drastic change of behaviour of a person.

Source: en.wiktionary.org

Words in the phrase

who are you and what have done with someone

Close letter words and terms

who am I kidding who are Who are you who are you telling Who ate all the pies who cares