Richard Dawkins has claimed many times in public speeches, especially in reference to the documentary “Expelled”, that documentary filmmakers use the expression “Lord Privy Seal” in a disparaging manner to describe the amateur’s tendency to illustrate words or sentences spoken by the narrator with a straight picture depicting said concept.
However, a Google search for the term only reveals references to the English nobility title (which the saying is supposedly derived from) and to Richard Dawkins making this claim. Even the Wikipedia entry refers to Richard Dawkins. One would think that if it’s a well-known expression in the trade, surely some documentary filmmaking fansite, glossary or handbook would define the term, and Google should be able to find such a page which predates Richard Dawkins.
Is this term real, or did Richard Dawkins (or someone he knows) make it up?