.
>>>...The term as used by musioians did not "start" with the given horse-related definition and the article does not say nor imply that...>>>

True that...the dictionary did not imply that. But I will.

There is a line in Macbeth where Shakespeare uses "chops" to refer to a human mouth. This tells me that there is a long tradition of carrying the equine word over to humans. It seems likely that the musicians' expression is a similar play on words. Of course I cant prove it, but I am sticking to it.


Flatfoot sez: Call me when 'Talent-in-a-Box' is ready to ship! -- [8{>

Got some tunes on You Tube:
http://www.youtube.com/user/flatfoot50
.
My BiaB lesson site:
http://jdwolfe0.wixsite.com/learnbiab