The word "backhanded" means expressing a compliment, remark, or action that seems polite but actually has a hidden insult or criticism. Full definition
He also has a pretty smart mouth and delivers plenty of backhanded compliments in game. (thatvideogameblog.com)
In backhanded ways, certain bits of DNA or RNA — a molecule that normally transmits a genetic message — can actually suppress a gene's information. (sciencemag.org)
Think of running on a grass tennis court as opposed to returning backhands on a playground asphalt court. (discovermagazine.com)