Sorry No Cure
Origin: English/Singlish – literally means saying sorry does not help at all.
Sorry no cure is often used in reply to someone who had just committed an act be it by speech or action that hurt you. The damage had been done and saying sorry will not reverse the damage.
Example:
Ah Lian: “Ah Hua, sorry I did not mean to post our wefie on social media…didn’t notice the big booger on your face… :p“
Ah Hua: “Sorry no cure lah!!!! Now my picture is spreading like wildfire on social media!! How the hell am I going to face the world???”