(as) mean as a junkyard dog

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(as) mean as a junkyard dog

Exceptionally cruel, spiteful, malicious, or violent. Her dad is usually a pretty nice, chilled out guy, but he's gets as mean a junkyard dog when he's been drinking. Don't go messing with that guy! He's mean as a junkyard dog—he'll rip your head off just for looking at him funny!
See also: dog, junkyard, mean
References in periodicals archive ?
As a boy, I knew what "mean as a junkyard dog" meant because Grandma had just such a dog, a dirty little pug that yapped and carried on at the slightest provocation.