A prearranged conspiracy, especially a crime such as a burglary. For example, The police suspected that the butler was in on it—it was a put-up job. This colloquial phrase was first recorded in 1810.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.