drummed out of the army

The phrase "drummed out of the army" refers to the act of dishonorably discharging a member of the military, typically a soldier, because of their misconduct, incompetence, or violation of military rules and regulations. It metaphorically suggests being "beaten" or "drummed" out of the army in a disgraceful or humiliating manner. This phrase often implies a public and dramatic expulsion from the military service.