To revoke or inhibit the ability to enjoy one's day. Comes from the idea of taking away someone's balls who uses them to have fun.
"
I'm being ball-jack (ed) right now, my Minecraft mods just won't work!
"
When you reserved a conference room slot and the person with the time slot before you eats into your time, while looking at you waiting through the window.
Tim slot-jacked the big conference room because he had the president on a conference call and couldn't get him to hang up.
The act of screwing around like a jackass.
Katlyn kept sending me strange non work related text. I asked her nicely to stop the jack horsery.
When someone livestreams your livestream on their channel without asking permission, especially if done for money or rewards on a cryptocurrency blockchain.
'Bro, that dude is stream jacking you!'
Something to plug your headphones into and what (possibly) phones today do not have
Bring the headphone Jack back1!1!!11!1!!1!11
Pull a Jack
A Jack is someone who has the ability to find and say something perverted for everything, even if it is totally unrelated to sex.
Can you not make sex jokes for just this one period because you always pull a Jack like that.
The act of entering somebody else's home and using they're Playstation/Xbox to play Call of Duty, online.
'Mate, I've been CoD Jacking in Dave's all afternoon'.