Some people are compared to dogs in bad ways. People who are unkind or uncaring can be described as "meaner than a junkyard dog." Junkyard dogs live in places where people throw away things they do not want. Mean dogs are often used to guard this property. They bark or attack people who try to enter the property. However, sometimes a person who appears to be mean and threatening is really not so bad. We say "his bark is worse than his bite."

A junkyard is not a fun place for a dog. Many dogs in the United States sleep in safe little houses near their owners' home. These doghouses provide shelter. Yet they can be cold and lonely in the winter. Husbands and wives use this doghouse term when they are angry at each other. For example, a woman might get angry at her husband for coming home late, or forgetting their wedding anniversary. She might tell him that he is "in the doghouse." She may not treat him nicely until he apologizes. However, the husband may decide that it is best to leave things alone and not create more problems. He might decide to "let sleeping dogs lie."

Dog expressions also are used to describe the weather. The "dog days of summer" are the hottest days of the year. A rainstorm may cool the weather, but we do not want it to rain too hard -- we do not want it to "rain cats and dogs."