Bring on the nonsense

Could you help me to explain the meaning of this phrase: “Bring on the nonsense”. Is it an idiom?
thank you,

It just means ‘let’s start the fun and games and general silliness’.

I suspect you heard it on a television show.

Thanks, Beeesneees.
Actually, I see it in a book. This is a whole sentence: “Bring on the nonsense - no song is too silly as far as your giggly wiggle-worm is concerned.”