A party animal refers to someone who likes to attend parties and usually drinks large amounts of alcohol. party animal 就是指那些乐中于赴各类派对，喜欢这类社交活动的人。

Examples:

Are you a party animal or do you enjoy a night at home? 你是一个派对达人吗，还是喜欢晚上在家中度过？

Tom goes out to parties nearly every weekend. I am not as much of a party as Tom. 汤姆几乎每周都去派对。我可不像汤姆那样是个派对狂。