1
general::
Phrase(s): A barking dog never bites.
Prov. Someone who makes threats all the time seldom carries out the threats. • Old Mrs. Smith keeps saying she’ll call the police if we walk on her lawn, but don’t worry. A barking dog never bites. • My boss threatens to fire me at least once a week, but a barking dog never bites.
McGrawhill's American Idioms And Phrasal Verbs