Means silence. Usual meant as in opposition cannot reply due to no ammo, or something so shocking was said no one can dare say anything further, or a third option - that something was said so outlandish there is no point bothering refuting.
I'd guess saying that Trevino would get whomped by today's big hitters is objectionable.
Isn't a 4th explanation that the vast majority of posters now realise that Dariusz is so entrenched in his views that there is no point, value or even entertainment in trying to debate the point?
This argument has been running for years, on this forum and others, and no amount of stats, or lack of stats, or expertise, or research, or common sense has shifted D one inch in his views. For a while back there, I think he conceded that, for the handful of times that Hogan is reported to have played "the perfect round" of fairways and green - there were any number of other examples of other players with a record of doing the same thing.
Sadly, normal service has resumed and we're back to modern golf, and modern golfers being rubbish - not fit to replace the divots of anyone who played in sepia, or for whom a smoking drive just meant a ciggie clamped between their teeth whilst they played.