What is the origin of the idiom "head over heels" and when to use it?

The idiom "head over heels" originated in the late 18th century and has its roots in the earlier phrase "heels over head." The idiom means to be in a state of extreme excitement, confusion, or intense emotion. It is now used figuratively to describe a person experiencing a complete overturning or turning upside down, as if their head is positioned below their heels. Over time, the phrase shifted to "head over heels" to convey a sense of being completely absorbed or immersed in a particular state or situation.

What is the origin of the idiom "head over heels for someone" and when to use it?

The idiom "head over heels" is believed to have originated in the 16th century. It is thought to be a reference to the idea of being so in love with someone that one is literally turned upside down. The phrase has been used in literature and popular culture for centuries, and it continues to be a popular way to describe being deeply in love. It conveys a sense of intense infatuation and overwhelming emotions, where one's thoughts and feelings are completely consumed by their love for the other person.