Lyric discussion by rendalf 

This song sounds like a confrontation with the "Tawny Gypsy Girl", maybe at a carnival. He fell in love with her.

The Shiny reference is a reference to watery eyes or weeping. I think he's confronted her about cheating because of the flirting with the Sullen Beery Swine and the Boys in Denim Vests. And he's afraid it could all be in his head, referenced by calling himself a dull and witless boy.

He's just not sure if she's really crying or faking it.

That's my take.

Beautiful song either way.

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