Having well-developed muscles; muscular. He has been working out a lot and is looking really jacked.
Stolen or taken by force. The car was jacked from the parking lot last night.
Excited or stimulated, often due to adrenaline or drugs. After drinking three cups of coffee, she was completely jacked and ready to start her day.
Broken, damaged, or otherwise in a very poor condition; messed up. My laptop is completely jacked after I dropped it.
To lift or raise something, especially with a mechanical device. He had to jack the car up to change the tire.
To increase or raise something, such as a price or level. The company decided to jack up the prices of their products.
To steal or take something, often used in the context of car theft. Someone tried to jack my car last night.
To boost or enhance something, often used in the context of energy or excitement. The coach tried to jack up the team's morale before the big game.