'Foul' in the Bible

After hearing this, the king of Israel rode back to his palace in Samaria, frustrated and in a foul mood.

Ahab went back to his palace, sullen and in a foul mood, because Naboth the Jezreelite had turned down Ahab's offer by saying "I will not transfer my ancestors' inheritance to you!" He laid down on his bed, curled up with his face to the wall, and refused to eat.