One of the most popular colloquial expressions people use when engaged in a light or idle conversation is "chewed the fat." However, there are different antonyms that can replace this phrase, depending on the context, tone, and intent of the speaker. For instance, if someone is in a formal setting and wants to discuss an issue in a concise and focused manner, they could say "discussed the matter" or "delved into the details." In a more casual or playful tone, a person could use "shoot the breeze," "chat up," or "banter back and forth" to convey the same meaning as "chewed the fat." Ultimately, the choice of antonym can reflect the speaker's communication style and mood.