Huh. All my life, in my lexicon, someone being on their "high horse" meant getting up on a soapbox with a little anger thrown in. So when I used the idiom in my posts on November 20 and November 30, that's exactly what I meant.
I just Stumbled Upon an idiom list on the internet that defines "high horse" as "arrogant and displaying moral superiority over others." Uh-oh. That wasn't what I intended at all! So I thought, I'd better look this up in Merriam-Webster!
And I did: "An arrogant or unyielding mood or attitude." Synonyms: "haughtiness, imperiousness, pretentiousness, self-importance..."
Oh meine Güte! (Oh my goodness...it just sounds more emphatic in German!). SOAPBOX, I meant SOAPBOX!
To use another idiom, sometimes I'm just not the brightest bulb in the chandelier! Sorry, folks.