Relationships within crew teams, often happening because of the long periods of time spent between crew members. What constitutes a valid case of Crewcest:

- hooking up and or sexual relations
- talking for a substantial period of time

- mutual open admiting emotional feelings for each other
- going on a date or prom
Girl and boy are seen at regatta holding hands while wearing matching unis.

Bystander: Crewcest strikes again.
by Bo Oats May 23, 2011
Top Definition
The inevitable and disturbing tendancy for rowers to hookup with an alarming number of team members of the opposite sex.
YO, did you see Joe and Jen hookup at the crew party last night?

by V&A September 20, 2009
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