Meanings
Attested from the 14th century onwards, originally as heels over head, which better rendered the notion of things being upside down (head over heels is the standard state of being).
How to pronounce "head over heels":
AU
Tumbling upside down; somersaulting.
Example: "She tripped and rolled head over heels down the hill."
At top speed; frantically.
Example: "Hearing the noise in the dark, the children ran head over heels back home."
Hopelessly, madly, to distraction, deeply, utterly.
Hopelessly smitten, madly in love.
Example Sentences
1
She's head over heels in love with him.
2
He fell head over heels for the new employee.
3
They are head over heels for each other.
4
After their first date, she was head over heels for him.
5
He was head over heels when he got the job offer.