Dictionary

To raise, hoist, or lift a thing using a jack, or similar means.

Example: He jacked the car up to change the tire.

To raise, increase, or accelerate; often said of prices, fees, or rates.

Example: I can't believe they're going to jack up the price of gasoline again — and after they already raised it twenty cents a gallon!

To ruin; wreck; mess up; screw up; sometimes as a bowdlerized substitution for fuck up.

Example: I'm not letting him use my computer again; he always jacks it up.

To give up; to abandon (something, e.g. a job, contract)

Hoisted, lifted off the ground, or propped up using a jack.

Example: Do you want to rotate the tires while we have the car jacked up?

Describes a 4x4 automobile that has a "lift kit", raising the body and/or frame higher than stock.

Example: He took us for a ride in his awesome new jacked up truck.

Significantly increased or expanded.

Example: It's hard to make ends meet with the jacked up price of gas.

Under the influence of stimulants; high.

Example: They were all jacked up on coke.