Jehoshapat was the fourth king of the Kingdom of Judah, perhaps about 873-849 BC. His reign is mentioned in the Old Testament in 2 Chronicles, 1 Kings, and 2 Kings. His name was widely used in a mild oath in the United States, especially in the phrase “Jumping Jehoshaphat!” starting in the middle of the 19th century, perhaps as a substitute for Jehovah or Jesus.