Duck soup

Origin

In the bustling American landscape of the early 20th century, a simple, thin soup was considered the epitome of an effortless meal—easy to prepare, easy to eat, and requiring minimal fuss. "Duck soup," often referring to a clear, light broth, embodied this simplicity. The phrase quickly migrated from the kitchen to the broader lexicon, seizing on the inherent ease of the dish to perfectly describe any task that was ridiculously simple to accomplish. It became a popular piece of American slang, a punchy shorthand for something utterly undemanding, as easy as slurping down a bowl of broth.