Beaten cardboard bungalow
The use of the word cardboard is an obvious hyperbole to emphasize the condition of the “bungalow”. Also homeless people live in cardboard boxes, Fitzgerald is comparing Nick’s house to that of a homeless person. It also adds to the overall juxtaposition between Nick and Jay Gatsby. Nick lives in a shack where Gatsby lives in a castle like mansion.
To help improve the meaning of these lyrics, visit “The Great Gatsby (Chapter I)” by F. Scott Fitzgerald and leave a comment on the lyrics box