The appropriate phrase to use in battle which means that a soldier in your group is lying on the ground. This has been twisted into Caribbean slang to signify the same thing in context but with literal meaning and sometimes physical. Usually as an answer or response to a situation where a person doesn’t overcome the obstacle in it’s path
Guy1: Wha you geh do on tha test brudda?
Guy2:*Hand Gesture* MAN DOWN!
Scene: A gang of dudes chilling outside talking Shit when somebody happens to fall in a humorous but serious manner,
Someone yells: MAN DOWN!
Similar to the word TEK OUT