Co-tern

It is an intern with whom you work.

My co-tern is such a bitch; she never does any work and shops online like a fiend.

Co-tern by mogeez July 17, 2010

Coternity 

A college organization that both men and women can join. They mostly get together and party and fuck all the time.
Coed+fraternity.

John's in a coternity.

Coternity by Deep blue 2012 January 9, 2010