have (something) on (one's) conscience(redirected from have on their conscience)
have (something) on (one's) conscience
To have persistent feelings of guilt about something, such as an act of wrongdoing. It's because of your cruelty that your brother died. I hope you have it on your conscience for the rest of your days!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.