Some that come to mind are the Grob Gambit, Hammerschlag, and King’s Head Opening
A few others that are particularly bad but don't weaken the alongside would be something like the Ware Gambit
There aren't that many joke openings for black, but if you ever come across the Polish Opening (1.b4), the Grigorian variation (1...Nc6) has got to be the stupidest opening that attempts to be serious. A few others for black are the Barnes Defense and Borg Defense.
Practically just joke openings, such as the Bongcloud, Wayward, etc, I'd like to learn more because I just wanna have some fun in chess and don't know most of the silly openings