cuckoo bananas is an expression usually said when something goes wrong or you make a certain mistake. Or simply just say the word because its fun saying it :P
"omg thats SO cuckoo bananas!"
or simply
"Holy crap im gonna go cuckoo bananas!"
Homer Simpson's nickname for *, AWOL George, Shrub, Miserable Failure, Cimpy McCokespoon, Dumbya, etc. (George W Bush)
Marge: Bart, I love you, but sometimes I don’t love your choices. (sigh) Now we have to find another school for you.
Homer: Yeah, and if you get kicked out of that one you’re going straight in the army where you’ll be sent straight to America’s latest military quagmire. Where will it be? North Korea? Iran? Anything’s possible with Commander Cuckoo-Bananas in charge.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.