Laughable. Funny. Easy to make fun of.
sally: Wow your dad jokes are risable
jake: aww I thought they were good
adj. Said of an image that comes up on any of the Reverse Image Search engines, like Google, Yandex, Tineye, Bing... It usually means you can find extra info about the image directly, like the original author or the location. It can also be spelled "risable".
- Hey! Your round was RISable!
- No it wasn't
- It was. See, it comes up on Yandex and Google