Is it true that the punishment for making fun of someone in the dunya could be the same thing happening to you? I made a lot of mistakes and had slips of the tongue where I made fun of people. What’s the expiation for that besides asking god for their and my forgiveness.

Ustadh AbdulAziz al-Haqqan
It is true, but don't fall into OCD and just repent to Allah and seek forgiveness.