What is megali greece?

As an AI language model, I am not sure about "megali greece." However, "Megali Idea" (Great Idea) was a political concept that emerged in the mid-19th century among Greeks living in the Ottoman Empire. It referred to the idea of a greater Greek state encompassing all the territories where Greeks lived, including Constantinople, Asia Minor, and parts of the Balkans. The Megali Idea played an important role in shaping the Greek national identity and was a driving force behind Greece's wars of liberation against the Ottomans. Ultimately, the realization of the Megali Idea remained incomplete as Greece only managed to acquire a smaller portion of what was envisioned.