Stands for Carry on Consuming Society.

An invitational drinking club of St Cuthbert's Society, a College of Durham University initiation to which will involve drinking incredible amounts, swimming the River Wear naked and hammered and sprinting between the 14 college bars of Durham.
Cuth's Man 1: Woah, you got invited to Coc Soc as a fresher? how did you manage that?

Cuth's Man 2: Kept a yard down after the rugby, I get noticed. Hope I don't die in the initiation
by Dougal McFougal May 11, 2009
Get the Coc Soc mug.