Some people are compared to dogs in some ways. An unfriendly or indifferent person can be described as meaner than a garbage dump jdog:

Some people can be compared with dogs in some ways. They are inconsiderate and don't understand others, even worse than a stray dog.

Another: Idioms appearing in New Year greetings:

Dog tired means "very tired, as tired as a dog";

* Being unpopular in the kennel and losing trust;

Dogs in garbage dumps are annoying people. Can dogs in garbage dumps not be annoying?

It is raining cats and dogs;

* Every dog has its day, which means "everyone has his day", which is absolutely correct;

* Love me, love my dog, "If you love me, you must love my dog. The British regard dogs as family ";

* The dog-eat-dog world "is a competitive and predatory world". If you directly understand it as "dog-eat-dog world", I have no problem.

* Lucky, "lucky", this is best not to be understood as "lucky", which is somewhat indecent;