don't bark if you can't bite
proverb Don't use threatening or aggressive words if you don't intend to take similar action. Bullies are notorious wimps. Don't bark if you can't bite, right? That kid will totally beat you up, so don't bark if you can't bite. A: "Don't bark if you can't bite, buddy!" B: "OK, I think we've all had a little too much to drink. Nobody really wants a fight."
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