Jackinoof 

Old man who interacts with young teens on twitter to remind him of his youth.

“Hey yall how old is Jackinoof?”
“He is 8762 years old.”

Jackinoof by ihatetwitterisers October 26, 2020

jackinworld 

also known as jackinworld.com is a website dedicated to masturbation of mostly male but some female. It separates the myths from the facts. The website includes masturbation techniques, biographies, FAQs, polls, and everything else that you may need to know about masturbation. This is not a pornographic website; it is an educational website.

Hmm, jackinworld.com I wonder what this is, omg the answer to my teenage years and boredom

jackinworld by Jack n world October 9, 2008

jackingoff 

Jacking off: Grabing your penis and moving your hand up and down until you are satisfied or until orgasim

Dude i like jackingoff.

jackingoff by joshua J.T.H July 14, 2006

Jackintosh 

A computer used exclusively for porn.

I have my desktop for work and my family tablet, or as I refer to it, my Jackintosh.

Jackintosh by UNSTABLETON_LIVE May 18, 2015

Jackintosh 

A nickname for the Atari ST computer, after Atari Corporation's then-CEO Jack Tramiel. A reference to it being a cheaper competitor to the Apple Macintosh.

My parents were poor in the 80s and so they bought a Jackintosh for me to do homework on.

Jackintosh by guitari January 28, 2023

jackiboo 

A Thicccccc Boi

Jackiboo is looking extra thic today.

jackiboo by Kian the phil jones hater January 20, 2018

Jackinho

A guy who thinks putting 'inho' on the end of his name is cool. In reality, it isn't. Jackinho is someone who isn't very popular and doesn't have any friends and really struggles to adapt to the realities of society and is often friendzoned by girls who are convinced he is gay. This is a guy would often write very poor poems about his emotions just to gain some form of attention from people he doesn't know. He is very much life's own perfect loser.

Brooks: 'Do you know that Jack kid?''

Akers: 'Jackinho, the poem writing loser. Yeah I know of him, everyone thinks he's a muppet'

Jackinho by alanobviously July 6, 2014