Reow is a playful spelling of a cat's meow that has become a familiar shorthand in memes, pet videos and reaction clips online. Short animal sounds like this travel easily because they need no translation, and creators reuse them to give cats, drawings and even people a cute, demanding voice. The clip works especially well in short-form video, where a two-second sound can carry a joke on its own. Its lasting appeal comes from that instant recognition: almost anyone who has lived with a cat knows exactly what this sound means.