Listed online as FX CFK Of Course, this short clip circulates mainly as a shareable reaction sound rather than a full scene or song. Its appeal comes from how a familiar two word phrase can signal agreement, sarcasm, or smug certainty depending on the edit around it. Creators reuse it in short form videos, soundboard collections, and meme compilations where a quick verbal punctuation mark is needed. Because the wording is everyday language, it fits many situations without needing context from a specific story, character, or franchise to understand the joke.