Yes, but when challenged on that definition, you fall back to it just being an opinion. Such an argument doesn’t work in this context, since we’re actually trying to figure out what the term means. In that context, it matters less how you use the term, and more how it is actually used in discourse.
My observation is that the term usually refers to the idea of liberals who, due to privilege, are out of touch with the concerns of the poor and working class. They offer solutions that are overly simplistic and miss the real world issues. They are too caught up in the idealism to make sure their ideas are practical.
This idea is, like most conservative insults, overused. It is definitely about playing up the divide between blue states and red states. It is used as a way to dismiss any liberal ideas as being impractical.
But, as someone who lives in a small town myself, I’ve definitely seen it–the person who is both liberal, but also elite in denying the needs of the working class. It’s just far more rare than conservatives would have you think.
I would agree with those who say that upper class conservatives are more likely to be truly elite. The rich libertarian mindset that is inherently elitist, while rich liberalism isn’t.
On the other hand, NIMBY liberals are definitely the liberal elite. They say they care about all these things, but, when it has to impact their lives, suddenly they become just as shitty as the conservative elite.
The thing about conservative bogeymen is that they do usually base the idea on something that actually exists. They just exaggerate it to the point where it often loses all meaning. But I don’t think that “liberal elite” has quite gotten there yet.
That said, I would not use it. I would use the liberal terms. I’d simply refer to privilege and classism–when such is actually appropriate. And I note that, despite this being a liberal leaning message board, I’ve only encountered that a handful of times here.