Top Definition
confidential; inside information only between tow parties
"let's keep this info closed circuit, at least till we hear more from the bmoc."
by bungalow bill March 01, 2005
A group of guys with their penises in each other's assholes in such a way that the last man's penis is in the first man's asshole, creating a ring.
Guy 1: Hey man me and some friends are getting together this weekend for a closed circuit. You in?
Guy 2: Yeah man I'm free on Sunday!
by Tanzania fire ant November 20, 2015

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