What does this title 'One Flew Over the Cuckoo's Nest' mean?

[Daemon99]

There's a movie called "One Flew Over the Cuckoo's Nest".

Can some one please tell me what it means?
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Non-native speaker of English
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I intend to live forever - so far, so good.

[Jamie (K)]

It's a line from a nursery rhyme recited by one of the characters in the story, but I don't know the rhyme or its title.

[X6stringfreakx]

Since the book is set in an insane asylum, cuckoo, is another word for crazy or insane. Bromdon is the one who metaphorically, "flew over" the cuckoo's nest.