Every country has its own set of expressions that, for an outsider, don’t seem to make a whole lot of sense. They can vary from state to state, province to province, or even neighborhood to neighborhood. And even if you’re fluent in the language, that doesn’t mean you’ll get what people are really saying when they use local colloquialisms.
These French sayings that are common in parts of France are all proof. Sure, they may not make sense literally, but that’s what makes them all the more interesting.