Lying sack of sh*t

Where’d the phrase “lying sack of sh*t” come from? Cecil used it in his column about pathological liars. I’ve been using the phrase for many years but I don’t remember where I first heard it. I was tickled to see it today in print for the first time in the archive.

Seeing as there is a huge dump of Cecil’s columns online, a link to the nugget in question is useful: Is there really such a thing as a pathological liar?