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Blowing smoke revisited

Posted by ESC on April 29, 2003

In Reply to: Blowing smoke revisited posted by Word Camel on April 29, 2003

: I came across the word, "insufflation" in my The Word Museum (the book I raved about a few weeks ago) and it reminded me of the "Don't blow smoke up my ass" discussion. It means "the act of blowing gas or vapour into a cavity of the body, as when tobacco smoke is injected into the rectum." So perhaps the expression hasn't always been as figurative as it is today.

Does it say why that was done?