The phrase what the dog doing became a widely repeated meme caption and voice line online, usually paired with photos or videos of dogs in strange poses or caught mid action. This version adds the name Jim at the end, giving it the feel of asking a friend to explain what is happening. Short clips of the line spread through meme edits and soundboards because the wording is easy to recognise and reuse out of context. It remains popular for pet videos where the joke depends entirely on the dog's behaviour.