cross heart

cross one's heart (and hope to die)

Fig. a phrase said to pledge or vow that the truth is being told. It's true, cross my heart and hope to die. It's really true—cross my heart.
See also: cross, heart
References in periodicals archive ?
JAWBONE UP3 TEAL CROSS HEART RATE ACTIVITY AND SLEEP TRACKER (currently PS123.
She is also a board member of the Central Texas Regional Science and Engineering Fair, a first aid instructor for the American Red Cross Heart of Texas Chapter, and a member of the Waco Garden Patch Garden Club.
The New Cross heart failure service team and a pioneering scheme which has enabled 700 people to find work in the NHS both won top prizes in the Health and Social Care awards.
New Cross heart failure specialist nurse Elaine Harper said: 'This was the proudest moment of our careers.