首ったけ (くびったけ) Japanese meaning | KotomoraFreq.FrequencyTop 100,000 Meanings
1
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.
Those two seem to be crazy about each other.