1947 citing in Archie Comic of "butthole." What did it mean?

[sclements at NEO.RR.COM]

Google News hit, posted over at Straight Dope by an alert reader.

http://news.google.com/newspapers?id=plAsAAAAIBAJ&sjid=E8sEAAAAIBAJ&dq=calendar-girl&pg=4081%2C91102

Betty says to Archie  "Being an usher after school must be prime."

Archie replies  "Oh, it gets kinda butthole at times."

How would this get by a censor if it had a modern meaning?  What did it mean in the context of the times? Not in the OED as such that I could find.

Sam Clements,

who assumes it meant boring or same-o same-0.

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