2, shameless: it is not enough to do bad things, and it is not shameful at all;
3, despicable: describe poor quality, regardless of shame;
4. behave like animals: in the old society, people were shameless and behaved like animals. Describe people's despicable behavior to the extreme;
5. Dog Tour: Dog: Pig and Dog. Describing shameless people is worse than acting like pigs and dogs.