pay dirt 
noun [mass noun] North American
1Ground containing ore in sufficient quantity to be profitably extracted.According to one of many legends, Wickenburg named the Vulture Mine after the buzzards circling over his head as he struck pay dirt....
- The industry insists that companies won't drill unless they're certain to hit pay dirt.
1.1 informal Profit; success: the gig pays three hundred bucks a week—looks like I just hit pay dirt...
- Not only had they hit pay dirt, they returned ‘the gold’ within the primary phase or first 90-days of their journey.
- This time I hit pay dirt, and while the pages unscrolled on my screen a cold chill ran down my spine.
- In fact he had hit pay dirt as he was performing his joke to one of the country's top comedy managers.
- the streets are paved with gold
- the strength of
- the struggle for existence (or life)
- the Sublime
- the Sultan
- the summer country
- the sun
- the sun is over the yardarm
- the Supreme Being
- the sword of justice
- theta
- the tail of one's eye
- the tail wags the dog
- theta rhythm
- theta role
- the Tasman
- the Tatras
- the Temptation
- the Tempter
- the Theocracy
- the thick end of something
- the thin blue line
- the thin end of the wedge
- the three Es
- the Three Graces