The word "mad" can refer to a state of being extremely angry or intensely annoyed. It can also describe someone who is mentally unstable or crazy. In everyday conversation, it’s commonly used to express strong frustration or anger towards a situation, person, or thing.
The word "mad" originates from Old English "gemædde," meaning "to be in a frantic state." It has evolved through the centuries, and in Middle English, it was spelled "madde." Its meanings have broadened from indicating simply someone who is deranged to also encompass a more generalized feeling of anger.