Comprehensive resource for understanding and mastering English idioms
The idiom "mad at" is used to describe extreme anger or fury towards someone or something. It can also be used to describe a state of being angry, irritated, or upset. The figurative meaning suggests that the speaker is so angry that they have lost control of their emotions and are behaving irrationally.
The idiom "mad at" is believed to have originated from the old English phrase "mædend," which means "mad" or "crazy." It was used to describe someone who had lost their mind or was behaving erratically. Over time, the meaning of the phrase evolved to include extreme anger or fury towards someone or something. The idiom has been in use since the 14th century and remains a common expression in contemporary language.