I always thought
I was more like a CUCKOO bird.
The Big Bang Theory Season 1, Episode 15
It's like the world's
fattest CUCKOO clock.
The Big Bang Theory Season 7, Episode 23
The newly hatched CUCKOO
eats all the food...
The Big Bang Theory Season 1, Episode 15
By that standard,
Penny is CUCKOO for Cocoa Puffs.
The Big Bang Theory Season 4, Episode 9
was for CUCKOO pills.
The Big Bang Theory Season 7, Episode 7