How to pronounce jacked:
Example: "You don't know jack"
Example: "Jack up the car so you can change the tire"
High on drugs or stimulants.
Broken, imperfect, especially when followed by 'up'. (see jacked up)
Example: "This computer is so jacked up, i'm surprised it can still turn on!"
Strong and/or muscled.
Example: "Wow, that guy is jacked!"