The term "M8" can refer to a variety of subjects, but it is commonly known as a type of military vehicle, specifically the M8 Greyhound. This armored car was used by the United States during World War II and the Korean War. It is recognized for its speed and mobility, making it effective for reconnaissance missions. In a different context, "M8" is also a popular slang term for "mate," often used in casual conversation, particularly in Australian and British English. It signifies friendship or camaraderie, reflecting a relaxed and informal way of addressing someone.