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 1, 2005
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When a consenting adult human with a penis double fists anally and vaginally a consenting adult human with a vagina while the fistee blows the fister. i.e 69ing but with consensual double fisting ;)
Trenton: Did you hear that Tammy and I completed a closed circuit last night?

Jake: Really?? You got both fists in there? Wow man I’m impressed.

Trenton: It took a lot of prep but it was worth it at the end, all out of lube though…
by sea creature of the mist July 3, 2021
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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 October 4, 2015
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Closed circuit slut;
Someone who fucks a handful of people exclusively but haves their own place/independence.
She's been fucking the same 7 guys exclusively since middleschool, talk about a closed circuit slut.
by Alice Underland January 25, 2019
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