Drinking alcohol releases the animal in man. (喝酒使人兽行大发。)
Street Talks
A: Rebecca, I got a D in maths this term. What do I do?
B: Sorry about that, Freddie. Cheer up! You can make it next term. But frankly speaking, if you weren't such a party animal, you'd have more time for studying. (喜欢参加聚会的人)
A: Joanna usually talks to animals and toys.
B: Poor Jo. If only she had a healthy family!
Youth is/are full of animal spirits. (精力十分旺盛)
That fighter is really an animal when he steps in the (boxing)ring. (当这个拳击手开始比赛的时候,他立刻变成了一个真正的野兽。)