In the black townships of South Africa, it means to abduct a woman and rape her. Named for a gang called the Jackrollers who did this in the Diepkloof area of Soweto in the late '80s.
There are some bad boys in this township, they are all about jackrolling ladies and hijacking cars.
A person who robs drunk people (out on the streets where the drunk bar people walk around at night).
"Man I can hardly walk straight lets take this alley as a shortcut to the next bar." "Dude, what the fuck man, that bum just jacked my slice of pizza" "Oh shit he just knifed me and then took my wallet!"
A "human" that spends so much time playing video games that their posture is level nerd neck. Everytime anyone goes tryhard they hunch down and their neck gets longer there fore a nerd neck is always hunched down cause they're always going try hard. In other words a nerd neck is a try hard, since their neck is 100% longer than the average human being due to playing too many video games and taking them serious, nerd necks are not even considered human anymore but something more sad. Nerd necks are often found on fortnite, their natural habitat usually being tilted towers.