"the presentational skills that seem to come easily to posh boys and PR liars. (we all know what 'posh' means by the way.)" ---
.,,.,.
In fact, pete, we could all think of 20 or 30 different overtones for the word; nearly all of them wearisomely ironic-pejorative. Occasional exceptions occur: "It's going to be quite a posh occasion, so put on a suit and tie, please", could be quite a vanilla thing for a wife to say as the couple prepare to go out, e.g. ~ but generally my pejorative view of 'posh' as pejorative will hold IMO. And, as such, it has, like 'bourgeois' or 'capitalist' lost thru over-definition any real meaning it might ever have had. Words like that I think best avoided in serious discussion; their use reflects badly on the unthinking nature of the remarks being made in which they occur.

~M~