
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

The newly hatched CUCKOO
eats all the food...
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

was for CUCKOO pills.
The Big Bang Theory Season 7, Episode 7