![It's like the world's
fattest cuckoo clock.
It's like the world's
fattest cuckoo clock.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
It's like the world's
fattest CUCKOO clock.
The Big Bang Theory Season 7, Episode 23
![By that standard,
Penny is cuckoo for Cocoa Puffs.
By that standard,
Penny is cuckoo for Cocoa Puffs.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
By that standard,
Penny is CUCKOO for Cocoa Puffs.
The Big Bang Theory Season 4, Episode 9
![I always thought
I was more like a cuckoo bird.
I always thought
I was more like a cuckoo bird.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I always thought
I was more like a CUCKOO bird.
The Big Bang Theory Season 1, Episode 15
![I thought it ended at cuckoo.
I thought it ended at cuckoo.](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
I thought it ended at CUCKOO.
The Big Bang Theory Season 1, Episode 15
![The newly hatched cuckoo
eats all the food...
The newly hatched cuckoo
eats all the food...](data:image/png;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=)
The newly hatched CUCKOO
eats all the food...
The Big Bang Theory Season 1, Episode 15