One's bark is worse than bite

One's bark is worse than one's bite.

Prov. Someone makes a lot of harsh-sounding threats but never carries them out. Don't get upset at anything my father says. His bark is worse than his bite. Jill: Lisa says she's going to sue me for letting my dog dig up her rosebushes. John: Don't pay any attention. Her bark is worse than her bite.
See also: bark, bite, worse