In my travels, extensive reading of novels of the 20s through 60s, work curating American films of the same period, checking reference books on American idiom, I have not and cannot find any reference to "So, new," "So new," "Sew new" or any variant thereof.
While this does not indicate decisively that there is not some corner where "So new" is a idiom, it does show pretty decisively that is not a common one.
The only use of those two words together that I can find is with "so" as an intensifier, not as an interrogatory.
In you last paragraph, you even seem to agree that "So new" has only been used by people who misunderstood the lyric in Guys and Dolls, so I am not sure why you argue something else in the first paragraph. |
