Feeling one's oats is an idiomatic expression that refers to feeling full of energy or enthusiasm. Some antonyms for this phrase include feeling down, lethargic, unenthusiastic, or disheartened. When you are feeling down, you lack the energy and drive to do anything significant. Lethargy is a state of feeling sluggish or drowsy, which can result from physical or emotional exhaustion. When you are unenthusiastic, you lack excitement or enthusiasm, which often leads to boredom. Lastly, disheartened is a feeling of discouragement or disappointment, which can result from a setback or failure. So, if you're not feeling your oats, it's easy to feel the opposite of the positive buzz the phrase connotes with these alternative expressions.
