party animal
US /ˈpɑːr.ti ˈæn.ɪ.məl/
UK /ˈpɑːr.ti ˈæn.ɪ.məl/
1.
a person who enjoys parties and similar social occasions very much and goes to as many as possible
:
•
My brother is a real party animal; he's always out at clubs.
•
She used to be a quiet person, but now she's a total party animal.