The line comes from The Wizard of Oz, the 1939 film in which Margaret Hamilton plays the Wicked Witch of the West and threatens Dorothy and her dog Toto. The full line is 'I'll get you, my pretty, and your little dog too,' and it has become one of the film's most quoted moments. Online, the final clause is often clipped on its own because it works without context, letting creators borrow an instantly recognisable villain voice for jokes about pets, rivals and petty revenge.