on your conscience
US /ɑn jʊər ˈkɑn.ʃəns/
UK /ɑn jʊər ˈkɑn.ʃəns/
1.
if something is on your conscience, you feel guilty about it
:
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The secret he kept was weighing heavily on his conscience.
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If you don't tell the truth, it will be on your conscience.