Sheffield North
The belief that Sheffield, England is actually the true north pole of the planet, enabling people from Sheffield to call everybody else in the world Southerners (a foul slur indeed).
Me: Newcastle? Filthy Southerner!
Geordie: But we're way more north than you!
Me: You've never heard of Sheffield North, then
Geordie: But we're way more north than you!
Me: You've never heard of Sheffield North, then