Most kicking can be understood as the most lively or exciting thing. Therefore, some appropriate antonyms for this phrase would be "least exciting," "least lively," "dullest," or "boring." Alternatively, the use of "most kicking" may refer to a highly energetic or aggressive action, in which case suitable antonyms would include "gentle," "calm," "subdued," or "relaxed." The choice of the antonym would depend on the context of the sentence and the intended meaning. In any case, by using antonyms, we can better comprehend the concept and nuances of the original phrase.