In a somersault; upside down; head first.
Вверх тормашками, кувырком...
It was so dark Bob fell head over heels into a big hole in the ground.
In great confusion or disorder; hastily.
В большой спешке, торопливо.
He was head over heels in debt.
My friend is head over heels in love with the girl in his company.
Мой друг влюбился по уши в девушку из его компании.
She is head over heels in love with her new boyfrend.
Она по уши влюблена в своего нового парня.
She was head over heels in love.
The children all tried to come in the door at once, head over heels.