If you describe something as risible, you mean that it is ridiculous and does not deserve to be taken seriously.
英英词典释义
Adjective
1. arousing or provoking laughter;
"an amusing film with a steady stream of pranks and pratfalls""an amusing fellow""a comic hat""a comical look of surprise""funny stories that made everybody laugh""a very funny writer""it would have been laughable if it hadn't hurt so much""a mirthful experience""risible courtroom antics"