Meaning of the word "big enchilada" in English

What does "big enchilada" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

big enchilada

US /ðə bɪɡ ɛntʃɪˈlɑːdə/
UK /ðə bɪɡ ɛntʃɪˈlɑːdə/

Idiom

the most important person or thing

Example:
He thinks he's the big enchilada around here, but he's not.
Getting that contract was the big enchilada for our company.