Definition & Meaning of "locked and loaded"in English

What does "locked and loaded" mean in military and slang usage?

The structure combines "locked" (secured in place) with "loaded" (ammunition chambered), forming a phrase that describes a weapon fully prepared to fire. It is used to indicate being completely ready for action, whether in combat, competition, or everyday tasks. People typically say "locked and loaded" before starting a project, heading into a meeting, or preparing for any high stakes situation. The term originated in 20th century military and firearms training, emphasizing the two step process of locking a magazine into place and loading a round into the chamber, and later spread into action films, business jargon, and casual conversation.