Someone who's wild and untamable, and likes to shock. A loud and outrageous girl. A ZsaZsa doesn't want to take life too seriously.
Person A: "You're so much fun, such a ZsaZsa."
The ZsaZsa: "Groovy, wicked, cool, now let's dance!"
Person 1: "Quit being a ZsaZsa for a minute, this is important."
The ZsaZsa: "Lighten up, dude."