The antonyms for the phrase "most fired up" can be used to describe a person or situation that is not energetic, enthusiastic, or passionate. Words like dull, apathetic, indifferent, lethargic, and sluggish can be used as antonyms for "most fired up." A lazy, lackadaisical, or uninterested person is not fired up about anything. Similarly, a boring or uneventful situation will not get someone fired up. These antonyms can be used in a variety of contexts, like discussing a news story, a sports event or public rally. When energy and passion are missing, using antonyms to contrast can provide a more accurate description.