coregroup 

among your friends, these are the few that you are actually around the most, also can represent the main group in a tailgating organization.

Background: Started at Louisiana State University

I am tailgating with the coregroup this saturday.

coregroup by MJS September 10, 2004

Core Group 

A group of badass individuals that come together and isolate from other friends just to be closer to each other. The core group just happens and others envy their connection. Core Groups often have group messages to share inside jokes along with a hashtag #CG

"Core Group"

Core Group by Qubatron June 11, 2014

cookgroup 

A Group that helps men and women cop bare sneakers/clothes

Oi solecity is a sick cookgroup mate

cookgroup by danny43423 October 5, 2018