1. A person who parties harder then anyone at an event where drinks are in red party cups, ex college party, house party. Someone who always seems to show up when the party is started, because they themselves bring the party with them. Girls want to be with them, guys want to be them.
2. A song by rap group Greatness & Co. who coined the term.
Hater: "That guy is an asshole. He just stole my girl."
Girl: "She wasn't even with you, and he is way cooler. He is a red cup rockstar."
someone who thinks they are a rockstar because they play a musical instrument and have a rockstar haircut. They usually live in dream world believing their big break into the scene is just around the corner. This belief system carries well into their 40's or even 50's and some will never realise the truth of their existance. Seems to mainly affect christian musicians and guitar players. Christain's bands that go on tour in in a third world country that think that because a big crowd turned out they are rock legends when in reality it's the only form of entertainment these people have ever had.
Dude 1: did you hear Dave is in a band, he showed me his pictures on facebook, the crowd was huge?