Army bigwigs are high-ranking military personnel who have achieved a certain level of authority and responsibility. The term 'BRASS' is often used to refer to these individuals, as it is a slang term for high-ranking officers. Generals are the highest rank in the army, and they are responsible for leading troops and making strategic decisions. Topbrass is another term for high-ranking officers, and it is often used to refer to those at the very top of the military hierarchy.