A regular topic for humor is the "colorful folk saying". Years ago, Dave Barry did an "Ask Mr. Language Person" piece on what he called something like "senseless rural expressions", stuff like "like stomping snakes in a bucket".
Last year, Dilbert ran a strip that also goes for the meaninglessness of colorful sayings angle. This has actually led to some real-world use of a new turn of phrase around here: Happier than a wooden spoon at a spelling bee.
Try using it in conversation!