Danger dog is the slang term for a type of hot dog first sold by street vendors in Tijuana, Mexico, and is also known as a "Tijuana bacon dog." A danger dog is a hot dog wrapped in a piece of bacon, fried in oil and served on a bun with grilled onions and chili sauce.The term "danger dog" originates from this form of hot dog's reputation as being of cheap quality (or presumed low quality, as it is usually sold by unlicensed street vendors).