Definition och Betydelse av "up to {one's} (old|) tricks"

What is the origin of the idiom "up to one's tricks" and when to use it?

The idiom "up to one's tricks" implies that someone is engaging in their typical behaviors or activities, often with a mischievous or cunning connotation. The origin of this idiom is not precisely documented, but it likely comes from the idea of people having certain patterns of behavior, especially when they are up to something secretive or tricky.