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1. To increase sharply. Please stop jacking up the volume on the TV. I can barely hear myself think.
2. To raise something through the use of a jack, a simple machine used to lift things. We'll need to jack up the car before we can change this tire.
3. To stimulate, excite, or motivate, often but not always through the use of drugs. In this usage, a noun or pronoun is sometimes used between "jack" and "up." The star football player was suspended after it was revealed that he had been jacking himself up on steroids. This soundtrack jacks me up so much when I'm working out.
4. To inflict damage upon, physically or otherwise. In this usage, a noun or pronoun is sometimes used between "jack" and "up." Yikes, that car wash really jacked up your car's exterior. I'm not going to lie, that horror movie jacked me up for weeks.
jack someone up
1. Sl. to excite or stimulate someone, possibly with drugs. Tom jacked up his buddy by talking to him. Tom jacked up Fred with a lot of encouragement.
2. Sl. to motivate someone; to stimulate someone to do something. The mail is late again today. We'll have to jack those people up at the post office. I guess I'll have to jack up the carpenter again to repair my stairs.
jack something up
1. Lit. to raise something up on a mechanical lifting device. Now I have to jack the car up, so I can change the tire. Please jack up the car.
2. Fig. to raise the price of something. The store keeps jacking prices up. The grocery store jacked up the prices again last night.
Raise or increase, as in The cartel is jacking up oil prices again. This term alludes to the literal meaning of jack up, that is, "hoist with a jack." [Colloquial; c. 1900]
1. To lift something, especially a vehicle, using a jack: We jacked up the car to change the tire. I hurt my arm when I jacked the van up.
2. To raise some price or value by increments: Because of the drought, the stores jacked up the price of lettuce. That candidate is going to jack taxes up after the election.
3. To stimulate someone with or as if with a drug: My friend jacked me up on caffeine the night before exams. The coach jacked up the team with a pep talk before the game.
1. and jacked mod. excited. I was so jacked I almost passed out. Don was really jacked up about the election.
2. mod. arrested. (Underworld.) What time did Sam get himself jacked up?
3. mod. upset; stressed. I was really jacked up by the bad news.
4. mod. high on drugs. He’s jacked up, and he may have ODed.