People who are all bark and no bite threaten to do things that they are not really willing or able to do. Example: "That new manager threatened to fire me again, but I know he won't do it. He's all bark and no bite."

They are like dogs that bark to make you afraid, but they will not bite you. Example: "Yesterday that guy said he wanted to fight, but today he's all quiet and polite." Reply: "All bark and no bite."

Some people are not strong enough or brave enough to actually hurt you, but they still use words to try to make you afraid. All they can do is bark, but they have no teeth to bite. Example: "Don't listen to my brother when he gets angry; he's all bark and no bite."