fairy story vs song and dance

fairy story and song and dance both are nouns.

Word	Noun	Adjective	Verb	Adverb
fairy story	Yes	No	No	No
song and dance	Yes	No	No	No

As nouns, fairy story and song and dance are synonyms defined as:

fairy story and song and dance: an interesting but highly implausible story; often told as an excuse

Other synonyms of fairy story include cock-and-bull story, fairy tale, fairytale.

fairy story (noun)	song and dance (noun)
a story about fairies; told to amuse children	theatrical performance combining singing and dancing
an interesting but highly implausible story; often told as an excuse	an interesting but highly implausible story; often told as an excuse