ring knocker

noun

, Slang.

1. a commissioned officer in the U.S. armed forces who is a graduate of a military academy.

Example Sentences

And as Kino raised his right hand to the iron ring knocker in the gate, rage swelled in him, and the pounding music of the enemy beat in his ears, and his lips drew tight against his teeth—but with his left hand he reached to take off his hat.

From Literature