cross my heart
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Related to cross my heart: cross my heart and hope to die
cross my heart (and hope to die)
A vow that one is being truthful. Billy's the one who broke the cookie jar—cross my heart and hope to die!
cross my heartor
cross my heart and hope to dieSPOKEN
You can say cross my heart or cross my heart and hope to die when you want to assure someone that you are telling the truth. Note: The heart is traditionally regarded as the centre of the emotions. And I won't tell any of the other girls about it. I promise, cross my heart. Sam grinned and held out his hand toward her. `You don't have to worry, okay.' — `Are you sure?' Erin asked. — `Cross my heart and hope to die.' Note: This expression is used mainly by children. Note: This expression refers to the Christian practice of moving your hand across your chest in the shape of a cross.
cross my heartused 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.