The phrase "in short order" refers to something that will happen quickly, efficiently, and without delay. Antonyms for this phrase include slow, inefficiently, delayed, and procrastinated. If something is happening in short order, it is happening right away, without any hesitation or delay, whereas its antonyms depict the opposite of such a situation. "In short order" is usually used to describe things that need to be done urgently or within a tight timeframe. Conversely, its antonyms indicate that something is not being done quickly, and the delay in action could be detrimental to the outcome.