A person who dresses like an animal with the intentions of partying harder than the average person. One who organizes other party animals, because we party animals prefer to travel in groups; adding to the chaos and go-off factor. This person doesn't necessarily always need to dress like an animal to party, but facepaint and neon colors are highly encouraged. And most importantly, a party animal has more fun than a regular person could ever fathom.
Look at that awesome guy in the neon leopard leggings and amazing facepaint, he is having so much more fun than me! He must be a party animal!!