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 21:10-15. 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 27:1-12; 1 Samuel 28:1-2; 1 Samuel 29:1-11. 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 2:39-40. In the title of Psalms 34:1-22 he is called Abimelech.