جَبَانُ الْكَلْبِ
A person whose dog is timid.
This expression indirectly conveys generosity and hospitality. Frequent guests and visitors may make a household dog so accustomed to strangers that it seldom barks at them; the dog's timidity thus becomes a conventional sign of an open, hospitable household.
The words literally describe the dog, but the intended judgment concerns the owner's generosity. The inference relies on custom, so the actual existence or timidity of a dog is not an absolute condition of every use.