How to ruin this guy's reputation?

This guy courted me to be his girlfriend and he was crying because I rejected him, I just laughed at his face because he looks weak. I told him he's ugly and no woman will ever like him, he kept saying that he likes me and thinks I'm beautiful hahaha. I already know he acts entitled as I detected that he's clingy and desperate so I did what I did. Then months later, he has a girlfriend, so what's the deal huh? Whoever is the first to bite on his cheap words will be the one to get fooled by him? Retards.
How to ruin this guy's reputation?
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