pay dirt
Plural
pay dirts
1
a valuable or significant discovery, often resulting in financial gain or success
The idiom "pay dirt" originated in the world of mining, where it refers to a valuable discovery of ore or minerals that is profitable to mine. It is used to describe any situation where someone makes a valuable or profitable discovery, often after a period of hard work or effort.
- After months of searching, the archeologist finally hit pay dirt and discovered an ancient artifact.
- The company has hit pay dirt with its new product line, which is selling like hotcakes
2
ore that yields a substantial profit to the miner