flat broke

What is the origin of the idiom "flat broke" and when to use it?

The idiom "flat broke" originated in the early 19th century. The term "flat" in this context means completely or entirely, and "broke" is an informal term for having no money or being penniless. This phrase is used to describe a situation where someone has absolutely no money, is completely financially depleted, and lacks the means to meet their basic needs.