main squeeze

main squeeze  {n.},  {slang}

1. The top ranking person in an organization or in a neighborhood; an important person, such as one's boss.

Mr. Bronchard is the main squeeze in this office.

2. The top person in charge of an illegal operation, such as drug sales, etc.

Before we can clean up this part of town, we must arrest the main squeeze.

3. One's principal romantic or sexual partner.