Achish (â'kish), angry or serpent charmer. A Philistine king at Gath. David fled twice to him. The first time he was in some danger, from being recognized as one who had distinguished himself against the Philistines; he therefore feigned madness. 1 Samuel 1:21-15. The second time Achish treated David kindly, gave him Ziklag, and took him to the campaign against Saul, but was persuaded by his officers to send him home again. 1 Samuel 1:27-12, 1 Samuel 1:28-2, 1 Samuel 1:29-11. At a later period Shimei went to Achish in pursuit of his servants; but it is doubtful whether this was the same king. 1 Kings 1:2-40. In the title of Psalms 1:34-22 he is called Abimelech.