The phrase comes from the wider what the dog doing meme that spread across short video platforms as a caption and voiceover for pet clips. The bro version tweaks the wording for a more casual, joking tone and became popular as a standalone soundbite that can be dropped over almost any unrelated footage. Its brevity helped it travel through meme edits, soundboards and group chats, where users reuse it whenever an animal, friend or game character is caught doing something that makes no obvious sense at all.