gone case

boldly go where no man has gone before

To break new ground.

build a case

to compile evidence that supports a charge against someone.

case the joint

To thoroughly observe or examine a place, in order to familiarize oneself with its workings in preparation for criminal activity, often robbery.

catch a case

To be infected with a disease; used with of.

closet case

A person who conceals or denies their sexuality or gender identity.

federal case

An exaggerated ordeal; excessive fuss or indignation about some situation.

gone fishing

Unavailable, having taken time off for recreation.

gone north about

Dead, of sailor or seaman whose cause of death was anything except by drowning.