Antonyms for "most fired-up" refer to the opposite meaning of the phrase, which is characterized by enthusiasm, excitement, and motivation. The opposite of "most fired-up" would be the state of being uninterested, unmotivated, and uninspired. Some examples of antonyms for "most fired-up" can be words like disinterested, indifferent, unenthusiastic, apathetic, and unexcited. People who are not fired-up lack energy and interest in something, making them less likely to engage actively in it. However, it's important to note that these antonyms are subjective and depend on each person's perspective and attitude towards a particular situation or task.