Antonyms for the phrase "chew the fat" include "be concise," "be silent," "keep quiet," "stop talking," "get to the point," "be brief," "remain silent," "hold one's tongue," "cut to the chase," and "keep it short." These antonyms imply a desire for swift and efficient communication with minimal small talk. Instead of chatting idly, one can express their ideas quickly and directly, eliminating extraneous conversation. When discussing important topics or participating in meetings, using antonyms for "chew the fat" can help avoid wasting time and getting off track. Effective communication means getting right to the point and using language economically to say what needs to be said.