The phrase "be fitting" refers to something that is appropriate or suitable for a particular situation, person, or occasion. The antonyms for this phrase include words like unsuitable, inappropriate, improper, unfitting, inappropriate, incongruous, and incorrect. The opposite of something that is "be fitting" would be something that is out of place, does not match the circumstances or the person, or simply does not belong. When something is not "be fitting," it can be seen as disrespectful, arrogant, or just plain wrong, and can lead to social, professional, or personal consequences. Therefore, it is essential to always consider what is "be fitting" before making any decision or taking any action.