Slang Kooky Posted November 3, 2014February 25, 2020 Evil Kooky (adjective) = strange or eccentric Ex: In the past, they doctors had a lot of “kooky” ideas about medical treatment, like electric shock therapy. Ex: My “kooky” neighbor has 30 cats all named Steve. BACK to Slang Open modal× Become an Evil English Member! Try it FREE for 1 month! Click here to learn more