I have not heard that term for a long time and even when I did, I was not sure what it meant.
I think it means people that are good talkers, but do not really know what they are talking about. They know how to use the jargon and fancy sounding words.
Like when you are are at a cocktail party and you see everyone crowding around the guy at the fire place straining to hear him talk. It sounds like he really knows what he is talking about.
There is a difference between those who know what they are talking about and those who sound like they do. And the later are dangerous.
I think it means people that are good talkers, but do not really know what they are talking about. They know how to use the jargon and fancy sounding words.
Like when you are are at a cocktail party and you see everyone crowding around the guy at the fire place straining to hear him talk. It sounds like he really knows what he is talking about.
There is a difference between those who know what they are talking about and those who sound like they do. And the later are dangerous.