big enchilada
1. The most important or powerful person in a group, organization, business, or movement (e.g., the boss, leader, etc.). Primarily heard in US, South Africa. I think it sounds like a great idea, but you'll have to ask the big enchilada first.
2. An object or goal of great value, importance, or consequence. Primarily heard in US, South Africa. We only need to win two more games in the tournament to take home the big enchilada.