At one go Definition 1 of 1Pro Tip 1/3Colloquial Usage Used in casual conversations rather than formal writing or speeches. I managed to watch the entire season at one go. Pro Tip 2/3Conveys Efficiency It often suggests completing a task efficiently without taking breaks. She packed all her suitcases at one go. Pro Tip 3/3Possible Exaggeration Sometimes, it's used to exaggerate the speaker's ability to do a lot in a single attempt. He claimed he solved the puzzle at one go.