head over heels (in love)
completely in love

[TahlilGaran] Advanced Learner's Dictionary ▲

head over heels
head over heels (in love)
to be in love with someone very much.
It's obvious that they're head over heels in love with each other.

Usage notes: often used with fall to describe the beginning of a relationship:
They met at a nightclub and instantly fell head over heels for one another.

[TahlilGaran] English Idioms Dictionary ▲

head over heels
upside down, head first
He fell head over heels when his bicycle hit the wall.

The little boy fell head over heels down the steep hill.

[TahlilGaran] English Idioms Dictionary ▲

head over heels
1a. In a somersault; upside down; head first.
It was so dark Bob fell head over heels into a big hole in the ground.
Compare: UPSIDE DOWN.
1b. In great confusion or disorder; hastily.
The children all tried to come in the door at once, head over heels.
Compare: TOPSY-TURVY.
2. informal Completely; deeply.
He was head over heels in debt.
She was head over heels in love.

[TahlilGaran] English Idioms Dictionary ▲