Definition of crewing:
(n) :
A group of people (often staff) manning and operating a large facility or piece of equipment such as a factory, ship, boat, airplane, or spacecraft.
(n) :
A group of people working together on a task.
(n) :
A group of people together
(n) :
(informal, often derogatory) A close group of friends.
(n) :
(often derogatory) A set of individuals lumped together by the speaker.
(n) :
A person in a crew