The phrase "most chop-chop" implies speed, efficiency, and quickness. To find antonyms for this phrase, we need to look for words that indicate the opposite. Some antonyms for this phrase could include slowly, leisurely, unhurriedly, or steadily. These words imply a slower pace, taking time and care to do things thoroughly rather than quickly. Another antonym could be inefficiently, meaning that things are not done in a timely or organized manner. However, "most chop-chop" is a colloquial phrase, and antonyms may depend on the context in which it is used.