Going to their graves - Idioms by The Free Dictionary
go to (one's) grave (redirected from going to their graves)
go to (one's) grave
To die. I'm just worried that you'll go to your grave angry at your sister.
References in periodicals archive
First, the death rate would have continued unabated throughout 1996 and 1997, with tens of thousands going to their graves
He argued that bachelor farmers were going to their graves
without enjoying the pleasures of female companionship.