名词
1. 兽；野兽
You can refer to an animal as a beast, especially if it is a large, dangerous, or unusual one.
2. 兽性的人；畜生；禽兽
If you refer to a man as a beast, you mean that his behaviour, especially his sexual behaviour, is very violent and uncontrolled.
3. 讨厌鬼；王八蛋
If you call someone a beast, you think that they are behaving in a selfish, unkind, or unpleasant way.
4. （含诙谐意）有特定性质的事物，性格特别的人
You can use beast to refer to something or someone in a light-hearted way, and to mention that they have a particular quality.