: a drilling rig used in offshore drilling whose drilling platform is a barge from which legs are lowered to the bottom when over the drill site and which is raised above the water and supported on the legs to conduct drilling operations
: to move or lift (something, such as an automobile) with or as if with a jack (see jackentry 1 sense 3a)
She jacked up the car to change the tire.
He jacked up his shorts.
… steel rollers were situated at four points under the timber truss bridge, which had been jacked up above the temporary bridge.Civil Engineering
2
a
: to raise the level or amount of (something) : increase
jack up the price
Most loans still do carry a bevy of fees … all of which have been jacked up—in some cases doubled—over the past year. Fred R. Bleakley
The club jacked up cash prizes for the race to $514,000, almost double last year's purse. Kostya Kennedy
… the city's powerful economy has jacked up demand for dwellings. Ralph Bivens
b
: to increase (something) in intensity, scope, etc.
Jill [Gisvold] says she jacked up her training last fall "because I had some shake-ups in my life, and I found that running helped me deal with it." Bob Cooper
This Miami Vice rerun is a change-of-pace episode, with the comedy jacked up and the drama toned down.TV Guide
c
informal: to cause great excitement, enthusiasm, or energy in (someone)
Nothing jacks up a rabid sports fan more than visiting a modern sports bar armed with a high-tech viewing experience …Monterey County (California) Herald
With lead MC Will.I.Am and bandmates … bounding about the stage like aerobics instructors after a quadruple latte, the group jacked up the crowd with "Let's Get It Started" and its current single, "Don't Phunk With My Heart." Dan DeLuca
3
a
informal: to grab, shove, or handle (someone or something) forcefully
One day, some jerk jacked him up against a locker. "I'm in the air, feet dangling," recalls [Jim] Shea … Anne Marie Cruz
b
informal: to cause injury to (someone or something)
Saturday I jacked up my neck and shoulder while I was warming up to play golf. Patrick Dix
c
informal: to beat up or hurt (someone)
A Gainesville man with a history of battery convictions has been charged with child abuse after police say he admitted to "jacking up" an 11-year-old boy, resulting in bruises still visible to officers three days later. Sean P. McCrory
d
informal: to treat or confront (someone) in a harassing, rough, or overly aggressive and typically unwarranted manner
In recent months, the service has increasingly been contacted by youths who say they were "jacked up" by police—stopped suddenly by anti-gang officers, frisked, questioned and sometimes roughed up, [David] Lynn said.Los Angeles Times
And in the course of being jacked up by the police, many claim they have been man-handled or physically mistreated. Jeff Yang