big end of town

arse end of nowhere

A very remote place.

big boy

A large object or person.

big boys

The people or bodies with the most influence and/or power.

big break

A breakthrough, especially the first big hit of a previously unknown performer or performers in the entertainment industry.

big bucks

Lots of money.

big cheese

A very important figure, especially a high-ranking person in an organization.

big deal

Something very important or difficult; a matter of great concern; a considerable feat or achievement.

big dick energy

Unassuming self-confidence.