Anti-compliment 

Worse than an insult, better than a compliment

Oh my god Becky, she just anti-complimented you!

Anti-compliment by CrackerRatato December 5, 2023

anticompliment

An anticompliment is complimenting someone, but also making fun of them at the same time.

Betty: "You look good when you're fat!"
Veronica: "I'll take that as an anticompliment."

anticompliment by dooky-man May 16, 2018