The term "chum around" refers to spending time with someone in a friendly and informal way. Some potential antonyms for this phrase include "keep distance," "avoid," and "ignore." Other antonyms might include "separate," "isolate," or "disassociate." These words suggest a lack of interest or engagement with others, or even active hostility towards them. While chumming around with others can be a fun and rewarding experience, there are times when it makes sense to distance oneself from certain individuals or groups. Ultimately, the choice of whether to chum around or not depends on a variety of factors, including personal preferences, social dynamics, and broader cultural norms.