（健身后）肌肉发达的having strong, well-developed muscles, especially as a result of working out (= exercising in order to improve the strength or appearance of your body)
He was trying to get himself jacked for the photoshoot. 他试图摆出肌肉发达的姿势以拍摄靓照。
These female weightlifters are absolutely jacked. 这些女举重运动员绝对是肌肉发达。