hackjack 

verb: to use wireless technology to hijack a motor vehicle that uses wireless technology.

Some really messed-up dude hacked into my car's computer to hackjack it by turning off the engine and starting the wipers.

hackjack by ShadeyHillRanch August 16, 2015

Hackback

When someone hacked you, so you hack them back. Hacking victims who seek revenge and hack the hackers who hacked them.

"My ex stole my password, so I did a hackback! He's now broke!"

"My Facebook was hacked, but I got that sucker back and now all his passwords have to be 52 characters long."

Hackback by Keyframegirl December 1, 2017

hackback

A 'hackback' is when you devastatingly (and at exactly the correct moment) cut through a flow of verbal abuse being directed at you - by using your own brutally accurate observations about your assailant's lack of intelligence, lack of good looks etc. All of those then pale into insignificance, as with rapier-like accuracy, you finally observe that your assailant is also well known in his or her peer group, as being someone who is completely unable to string any sentence together that lacks at least ten repeated swear words.

"Who says words can't kill? I looked at the bully and then chose my exact moment to deliver him a killer hackback. He left me and my friends completely alone after that."

hackback by mimbijones April 4, 2015

Hacksackery 

Noun: encompassing the fine art of hacky-sack and related activities

'After a few beverages, the crew were well and truly keen for some hacksackery"

Hacksackery by Yeech April 11, 2012