adjective, kook·i·er, kook·i·est. Slang.
Origin of kooky
Examples from the Web for kookie
Historical Examples of kookie
It is a great recommendation in obtaining a wife, when a Kookie can say that his house is full of stolen articles.A History of the Gipsies
adjective kookier or kookiest
1959, American English, originally teenager or beatnik slang, possibly a shortening of cuckoo.
Using the newest show-business jargon, Tammy [Grimes] admits, "I look kooky," meaning cuckoo. ["Life" magazine, Jan. 5, 1959]
Related: Kookily; kookiness.