That was clearly a jab at me.

那很明显是在针对我。

He neatly fended off a jab at his chest.

他利落地挡开了当胸的一击。

Why are you always taking a jab at your friends?

你为何总是挖苦你的朋友？

To push or jab at, as with a finger or an arm; prod.

推或戳，如用手指或手臂；戳。

Keys can especially do a lot of damage: If an attacker comes at you, scratch his face or jab at his eyes with the keys.

钥匙也会造成很多的伤害：如果攻击者靠近你，你就可以用钥匙刺向他的脸部或眼睛。