Here's why:
* Meaning: The phrase doesn't literally mean to chew on fat. It's a figurative expression that means to chat or gossip.
* Figurative Language: Idioms are expressions that have a meaning that is different from the literal meaning of the words.
* Common Usage: "Chew the fat" is a common phrase in English, often used in informal settings.
Let me know if you'd like to explore other literary devices!