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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.
by MJS September 10, 2004
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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"
by Qubatron June 11, 2014
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