The phrase not funny, didn't laugh spread online as a standard comment under posts people found unfunny, written in a deliberately flat, unimpressed style. Short voice versions turned that comment into a reusable reaction clip for edits and streams. The DK label in the title is how uploaders tagged this particular take, and its seven second length makes it easy to drop over a full failed bit. It stays popular because it says what viewers are already thinking, without needing any setup or context from a specific show.