The phrase "chews fat" is a colloquial term that refers to idle chatter or gossip. Antonyms for this phrase could include words such as "focuses," "works," or "engages." These words imply an active and purposeful approach to communication, as opposed to indulging in idle talk. Other antonyms that could apply to this phrase might include "listens," "meditates," or "contemplates," all of which suggest a quieter and more reflective approach to communication. In general, antonyms for "chews fat" would reflect a more productive and meaningful style of conversation, rather than idle chatter or gossip.