junkyard dog(redirected from Junk Yard Dog)
Also found in: Acronyms, Wikipedia.
Like this video? Subscribe to our free daily email and get a new idiom video every day!
An especially nasty, vicious, or savage person or animal (especially a dog). Of a person, often used in the phrase "meaner than a junkyard dog. Though he's always polite when he's in public, Tim's husband is meaner than a junkyard dog behind closed doors. That standard poodle may look cute and fluffy, but it's a junkyard dog, you can be sure about that.