Unruly hair that makes it look like the person has a party on their head. Often used to describe thick and long hair. Bares a very close resemblance to the term bed head.
I saw Mitch the other day. That guy has such party hair.
normally, college girls that have hair extensions, the hair extensions clip in and out but the only time that they wear it is to parties/on the weekends.
Hey Kayla, are you wearing your party hair tonight?