首ったけ くびったけ Also written 首っ丈, 頸っ丈 Meanings な-adjective, Noun deeply in love with; madly in love with; heads over heels in love with; to be crazy about Kanji 首 neck. Read as くび. Example sentences 彼はメアリーにすっかり首ったけだ。He's head over heels in love with Mary. Jinuma: Japanese Dictionary · Word lists