gone fishing

boldly go where no man has gone before

To break new ground.

bottom fishing

Buying, or seeking opportunities to buy, investment securities or other valuable properties at a time when markets are depressed and prices are low.

fishing expedition

A search for information, especially incriminating information, that is conducted without specific direction or goal, in the hope that something may turn up.

gone case

Someone or something that is deemed irredeemable, hopeless and beyond help; a doomed person or thing.

gone north about

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

gone with the wind

dead