1. To join other people as the crew of a ship or plane. Having no other real job opportunities, I decided to crew up on a cargo ship hauling goods to and from Southeast Asia. She's crewing up with some of the most experienced astronauts in the world for their next space expedition.
2. To gather together as a group in order to accomplish some specific task, especially to commit a crime. We're crewing up for a bank heist soon. You in?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.