Pay dirt

"Pay dirt" refers to soil or sediment that contains valuable minerals, particularly gold or other precious metals, making it worth mining or processing. The term originates from mining practices, where discovering pay dirt means finding a location that can yield a profitable amount of these resources. In a broader context, it can also describe any situation where effort leads to significant reward or success. Essentially, pay dirt signifies areas or opportunities that offer potential financial gain after investment and hard work.