首くびったけ

na-adjective, noun

head over heels in love; madly in love; crazy about

Colloquial expression meaning to be completely infatuated or deeply in love with someone. Often used in the pattern 〜に首ったけ.

• 彼かれは新あたらしい彼かの女じょに首くびったけだ。

  He's head over heels in love with his new girlfriend.

• あの二人ふたりはお互たがいに首くびったけらしいよ。

  Those two seem to be crazy about each other.