dirt file

circular file

The trash container; the wastebasket.

dig up dirt

To examine in order to find negative information for public opinion, usually with the purpose of embarrassing or discrediting a person.

dish the dirt

To tell salacious gossip.

eat dirt

To eat humble pie.

file away

To cause oneself to remember (something); to avoid expressing a feeling, fact or idea until an appropriate time.

file off the serial numbers

To alter identifiable details in a creative work in order to conceal its origin.

hit pay dirt

To strike it rich; to get lucky or have a big break.

rank and file

The members of an organization, community, etc. who are not in leadership positions.