"Arf" is a common onomatopoeic representation of a dog's bark. It is often used in literature, cartoons, and everyday conversation to mimic the sound that dogs make. This sound can vary in tone and intensity depending on the dog's breed, size, and emotional state. In popular culture, "Arf" can also refer to various characters or themes associated with dogs. For example, Snoopy, the beloved beagle from the Peanuts comic strip, is known for his playful antics and often expresses himself with barks like "Arf." This sound captures the playful and loyal nature of dogs in a simple way.