junkyard dog(redirected from Junk Yard Dog)
Also found in: Acronyms.
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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, Tiffany'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.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.