jab -
To poke or thrust abruptly, or to make such a motion.
jab -
To deliver a quick punch.
jab -
To give someone an injection.
Wikipedia
A jab is a type of punch used in the martial arts. Several variations of the jab exist, but every jab shares these characteristics: while in a fighting stance, the lead fist is thrown straight ahead and the arm is fully extended. It is an overhand punch; at the moment of impact, the pronated fist is generally held in a horizontal orientation with the palm facing the ground.