Meaning: A notoriously evil ruler.
1 King 18:17 And it came to pass, when Ahab saw Elijah, that Ahab said unto him, Art thou he that troubleth Israel? [18] And he answered, I have not troubled Israel; but thou, and thy father's house, in that ye have forsaken the commandments of the LORD, and thou hast followed Baalim.
2 King 8:18 And he walked in the way of the kings of Israel, as did the house of Ahab: for the daughter of Ahab was his wife: and he did evil in the sight of the LORD.