Chasing your tail

Origin

This vivid idiom springs directly from the animal kingdom, picturing a dog or cat frantically spinning around, trying to catch its own tail. It's a behavior often observed in playful puppies or kittens, a cycle of enthusiastic effort that, by its very nature, can never result in success. This simple, relatable image perfectly captures the human experience of expending great energy on a task or problem that yields no actual progress, leaving one perpetually stuck in a fruitless loop. The phrase thus humorously—or sometimes despairingly—likens our own unproductive endeavors to the innocent, endless pursuit of a pet's own appendage.