By that standard,
Penny is CUCKOO for Cocoa Puffs.
The Big Bang Theory Season 4, Episode 9
The newly hatched CUCKOO
eats all the food...
The Big Bang Theory Season 1, Episode 15
I thought it ended at CUCKOO.
The Big Bang Theory Season 1, Episode 15
Oh, yeah. The Mr. Spock CUCKOO clock.
The Big Bang Theory Season 10, Episode 10
I always thought
I was more like a CUCKOO bird.
The Big Bang Theory Season 1, Episode 15