Biggie (noun)

1. A very important or powerful person or thing.
2. A large or significant example of its type.

Origin:

1990s: from the phrase big shot.

Examples:

1. The new project is a biggie for the company.
2. He's a biggie in the music industry.
3. The event was a biggie for the city.
4. The deal was a biggie for both parties.
5. The win was a biggie for the team.