fighting mad

Extremely and aggressively angry; incensed. The guy got fighting mad when the waiter spilled wine on him, threatening to punch his lights out! I was fighting mad after the accident. The other driver didn't even apologize! I know you're fighting mad, but don't say anything to the boss you're going to regret later.

fighting mad

Infuriated. This colloquial expression of American origin dates from the late nineteenth century. William James used it in a letter of 1896: “If any other country’s ruler had expressed himself with equal moral ponderosity, wouldn’t the population have gone twice as fighting-mad as ours?”