Terminology, nomenclature, whatever....
Buzz is SPOT ON with his perfectly descriptive Trade term....
It is vital in perfecting stock fit , especially for you guys that want to go afield with English grips on your guns.
I heard it used 30+ years by the then owner of Atkin Grant & Lang , the renowned author, Mr. Adams. The conversation I was privileged to overhear was between he and a very Knowledgeable Double gun aficionado from South Alabama......
I think it was the American Walnut purveyor, Rhinehardt Fajen who first appropriated the term to describe his unsightly Trap Stocks, promoted in the 60's .
A move wisely calculated to apply the rifle shooting "gimmick" to the Trap field......Hell everyone knows, Trapshooters will try anything.....