What does all bark and no bite mean?

all bark and no bite meaning in Urban Dictionary

A commonly-used idiom. When someone is "all bark with no bite," it indicates that he / she is both:1. Threatening to accomplish something to you, it is certainly not ready to take action.OR2. Acting all hard, daunting, and agressive, but is too cowardly and chicken and/or additionally perhaps not strong adequate to be happy to also put one single punch at you.This idiom is really called, because these kinds of individuals are likened to puppies who keep barking at that you will need to turn you into afraid, but they are really not going to bite you.