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Often refers to "Jack-off instruction" or "Jerk-off instruction" Involves a girl or a guy "instructing" the audience how and when to stroke and how/when to ejaculate while often teasing or performing other sexual acts. It's mostly mixed with cosplay and other fetishes like foot worship, femdom and BDSM.
Saul: Holy shit dude, I've just busted the biggest load on some shit called JOI, you know of it?
George: Yeah, bro. My older sister used to film JOI when parents kicked her out
by EmporioF October 17, 2019
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May 14 Word of the Day
Intelligence agency term for "psychological operation". A government or corporate-sponsored operation, usually taking the form of a "terrorist attack" or "crazed gunman on a spree", with the intent of panicking the public into demanding more police and laws inhibiting freedom. Psyops are usually carried out by drugging a civilian or group of civilians with aggression-promoting drugs, psyching them up, arming them, and sending them out to commit mayhem. Government-sponsored terrorism. See also blackshirts, conspiracy
Person A: Man, that nutcase Martin Bryant guy shot 35 people in Tasmania!

Person B: No, he wasn't a nutcase, that was just a psyop so the government could have an excuse to ban guns.
by Mystikan April 11, 2006
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2
Giving someone instruction on how to jerk off, and or masturbate for pleasure. JOI=jerk off instructions.
Sally gave her boyfriend JOI over the phone during phone sex
by KatieValdez September 05, 2018
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3
Acronym for Jerk Off Instructions. A POV porn niche where the porn girls give explicit and detailed instructions on how to jerk off.
Greg found out that he couldn't stroke to a fulfilling orgasm unless he was watching hot girls in JOI porn.
by sarasplayroom.com August 31, 2010
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4
Jerk off instruction

A category of a pornographic video featuring a woman giving instructions to someone on how to masturbate.
Yesterday I came to JOI and it was so amazing.
by pzeudonym1 February 09, 2021
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5
A joi porno is a buere instructing you to walk off on her.... face tits ass etc
by Timber Tim February 20, 2018
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