inside job

WordReference Random House Unabridged Dictionary of American English © 2026

in′side job′, 

1. a crime committed by or in collusion with a person or persons closely associated with the victim:
   The robbery seemed an inside job, because there was no evidence of forced entry.

• 1905–10

Collins Concise English Dictionary © HarperCollins Publishers::

inside job noun

1. a crime committed with the assistance of someone associated with the victim, such as a person employed on the premises burgled