Longman Dictionary of Contemporary English
Wiktionary
n. (context idiomatic English) A person known for frequent, enthusiastic attendance at parties, especially one whose partying behavior is exuberant or excessive.
Wikipedia
Party Animal(s) may refer to:
Usage examples of "party animal".
It is the party animal of the atomic world, latching on to many other atoms (including itself) and holding tight, forming molecular conga lines of hearty robustness—.
By the time the flat crack of the fifth round split the air and echoed off the side of the Fleetwood, as Earl grew weary of his old dull personality and began to set loose the party animal within, Cass knew what to do, and did it.
Dare to give him two, however, and he redefines the term party animal.
Mr Daise has an apartment at the SSR building, and he is not much of a party animal.
His face portrayed someone who lived high, a party animal, a Las Vegas gambler, a womanizer.