To be somewhat amusingly crazy but not necessarily in a bad or threatening way. Someone can be temporarily kooked due to an event or generally be kooked all the time. For instance, Molly Shannon and Andy Dick are kooked but Tom Cruise and Hannibal Lector are not.
This is a variation on 'kookoo for cocoa puffs'.
1. "I just saw Brad Pitt on the street and I started screaming like a banchee and whipped my top off to get his attention. I totally went kooked."
2. "He makes his cat wear an Elvis costume and does air guitar to Carly Simon meaning he's friggin' kooked."
To be kooked is to be stoned, through smoking or consumption of marijuana. The word kook has a completely different meaning by itself, but variations suck as kooky are often used to describe various situations involving THC
"Man, I'm so kooked!"
"That is some kooky shit"
"Tonight we will be having a kookfest"
"Let's get kooked and eat pie"
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.