"Knocks for loop" is an idiomatic expression that refers to repetitive actions or events that are essentially pointless or futile. Synonyms for this phrase include "spinning one's wheels," "going around in circles," "getting nowhere fast," "beating a dead horse," and "running in circles." All of these terms evoke a sense of frustration or futility, and they are often used to describe situations where someone is struggling to make progress or achieve a goal. Whether you're stuck in a dead-end job, running afoul of a bureaucratic process, or simply feeling overwhelmed by the complexity of modern life, these synonyms for "knocks for loop" are sure to resonate with anyone who has ever felt like they were going nowhere fast.