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."