cross my heart used to emphasize the truthfulness and sincerity of what you are saying or promising. informal
☞ The full version of this expression is cross my heart and hope to die, and is sometimes reinforced by making a sign of the Cross over your chest.
英语词组固定搭配大全包含15956条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。