great guns

adverb

1. Informal. in a relentlessly energetic or successful manner:

   The new president has the company going great guns.

interjection

1. (used as an expression of surprise, astonishment, etc.)

Word History and Origins

Origin of great guns¹

First recorded in 1870–75

Example Sentences

When the Constitution drew near, the stranger hoisted the British flag and began to fire her great guns.

From Project Gutenberg

The first thing the Wasp found at sea was a mighty gale of wind, that blew "great guns" for two days.

From Project Gutenberg

But those were not the days of the great guns that can send huge balls six or seven miles through the air.

From Project Gutenberg

For an hour her men fought bravely, but her great guns were of no use, and a white flag was raised.

From Project Gutenberg

As they swept down in front of the city the great guns of the forts sent out their balls.

From Project Gutenberg