The phrase "most chop chop" implies speed, haste and urgency. Some antonyms that come to mind include "leisurely," "slowly," "deliberate," "methodical," "gradual," "cautious" and "careful." These words convey a sense of slowness, thoughtfulness and attention to detail, which are the opposite of the speedy, rushed feeling of "most chop chop." While there are situations where speed and urgency are important, taking a more deliberate and careful approach can often lead to better results and fewer mistakes. In sum, the antonyms for "most chop chop" emphasize a more measured, thoughtful, and careful approach to getting things done.