A posh can be used to just describe people who you think are of a higher class than you, and this makes it a little bit subjective. What is posh for one person isn't necessarily posh for someone else. It can be a question of perspective. I wouldn't be surprised if there were some English native speakers like people from England who listen to this and listen to me, and think that my voice is posh. But we're going to sort of test my poshness later on.