From Longman Dictionary of Contemporary Englishon your conscienceon your conscienceGUILTY/FEEL GUILTYif you have something on your conscience, it makes you feel guilty He didn’t want somebody’s death on his conscience. Could you live with that on your conscience? → conscience
Examples from the Corpus
on your conscience• It has been on my conscience ever since.• At least, he felt, an act of Providence had prevented him from having a death on his conscience.• It is a terrible thing to have on your conscience.• Rest it on your conscience if you wine and dine your lover and claim client entertainment.• Where that girl is concerned I have nothing on my conscience.• I have something on my conscience that I want to get off before I die.• No female could live with that on her conscience. 