The definition of breast-beating is a dramatic expression of sadness or remorse.
An example of breast-beating is when you loudly talk about your feelings about the treatment of the homeless.
the act or an instance of making an exaggerated display of one's feelings of guilt, remorse, etc.
Origin of breast-beating; from beat one's breast (see phrase under breast)
A loud, self-conscious demonstration of emotion, especially of remorse.