He seems to have written his memoirs mainly so that he can 'dish the dirt' on all his former lovers.
The police 'struck pay dirt' when a witness came forward with new information.
The band 'hit pay dirt' [=had a big success] with their first single.
(..) Since when do you talk that way to your master? My baby! No! - My baby! - It's just dirt. Where's my baby? Where are you, sweetie? Come out! Please, come out! Where are you? Sweetie! (..)2001 Spirited Away