"Jack's Mum" is one of the more common variations of the classic Your Mum
Originating in the Grimsby
area of England, the phrase has quickly circulated, becoming common among teenagers.
Although its implementation and purpose reflect that of the Your Mum
Joke, it can be used to make yourself look cool and witty, while not directly insulting anyone. Commonly referred to as "The Gentleman's Your Mum