The phrase "in the groove" is often used to describe someone who is performing at their best, feeling energized and confident. Some antonyms for this phrase could be "out of sync," "off target," or "off their game." These phrases suggest a lack of focus or concentration, indicating that the person is not performing at their best. Additionally, "uninspired" or "unmotivated" could be considered antonyms for "in the groove." These feelings suggest a lack of passion or excitement, indicating that the person is not fully engaged in their activity. Overall, these antonyms highlight the opposite of the qualities associated with being "in the groove.