Till their dying day - Idioms by The Free Dictionary
till (one's) dying day (redirected from till their dying day)
till (one's) dying day
For the entirety or remainder of one's life. Till my dying day, I will never forgive him for what he's done to our family. Despite all her doctors' warnings, my grandmother smoked cigarettes like a chimney till her dying day.
till/to/until your ˌdying ˈday for as long as you live: I swear I won’t forgive her to my dying day!
References in classic literature
em a bit comfortable; and you'll be among all your own friends as love you, and can help 'em and be a blessing to 'em till their dying day
Nobody would think of themselves as rich but all will carry the memory of harder times till their dying day