Pun Dog, also known as the Laughing Dog, features an Alaskan Klee Kai named Cashew whose expressive faces became an internet sensation. The meme gained massive popularity in 2012 after photos of the dog reacting to a treat were posted on Reddit, capturing a sequence that looks like a joke's delivery. The structure typically follows a three-panel format: the dog tells a pun, looks expectantly at the audience in the second panel, and then breaks into a wide-mouthed, squinty-eyed grin in the final panel. It serves as the ultimate visual representation of cheesy puns or dad jokes, where the teller is significantly more amused by the punchline than the listener.