The Chuckle Brothers famous saying "To you, to me" was coined during a visit to the red light district in Cleethorpes when they only had enough money for one Hooker between them.
J.K. Rowling is actually called Alison Fiona but chose the initials JK as that what she was when she had the idea for a book about a boy wizard during a Buckfast and MD2020 binge.
Blue Peter legend hated dogs. His famous Catchphrase "down Shep" wasn't about asking Shep to desist from jumping up on him but rather an anguished cry of rage hoping that a passing Vet would end Shep's life.