An absolute legend known as Evan from South London. He gets chicks whenever he wants, hes the type of guy to bang hotties wherever and whenever. Every boy wants to be him and every girl wants to be with him. If someone is a Great Gadsby they are up for a party anytime, a bit like the Great Gatsby only from South London, they do drugs and sexy ladies 24/7. They do lines and bang nines. They are just a legend in general.
E.g: Did you see that guy last night?, He reminded me of the Great Gadsby.