"[be] down to {sb/sth}" এর সংজ্ঞা এবং অর্থ

What is the origin of the idiom "be down to somebody or something" and when to use it?

The idiom "be down to somebody or something" is derived from the idea of reducing or depleting a resource or supply to the point where it is almost exhausted. The use of "down to" suggests that you have reached a minimal or critical level. It is used to describe a situation where the quantity or availability of something has been reduced to a limited or critical level, often implying that further reduction may lead to a shortage or depletion.