Then was Abner very wroth for the words of Ishbosheth, and said, Am I a dog's head, which against Judah do shew kindness this day unto the house of Saul thy father, to his brethren, and to his friends, and have not delivered thee into the hand of David, that thou chargest me to day with a fault concerning this woman?
Am I a dog's head? - i:e., a very dog; a proverbial form of expression, denoting a low, despicable character; and, impelled by revenge, determined to transfer all the weight of his influence to the opposite party. He evidently set a full value on his services, and seems to have lorded it over his weak nephew in a haughty, overbearing manner.