closed circuit 

confidential; inside information only between tow parties

"let's keep this info closed circuit, at least till we hear more from the bmoc."

closed circuit by bungalow bill March 1, 2005

Closed Circuit 

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…

Closed Circuit by sea creature of the mist July 2, 2021

Closed Circuit 

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!

Closed Circuit by Tanzania fire ant November 20, 2015

closed circuit slut 

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.

closed circuit slut by Alice Underland January 24, 2019