great guns

[great guns] {adv. phr.}, {informal} 1. Very fast or very hard. -Usually used in the phrases "blow great guns", "go great guns".

Thewind was blowing great guns, and big waves beat the shore.

The menwere going great guns to finish the job.

Compare: FAST AND FURIOUS.2. Very well; successfully.

Smith's new store opened last week andit's going great guns.