But I hardly mounted my high horse and made some kind of argument that this incident disqualified him from the presidency.
Anyway, far be it from me to get on my high horse about sensationalist covers.
You won't let that fellow ride the high horse in this style, will you?
He dismounted from his high horse, and the orphans got their own again.
Thus suddenly pulled down from his high horse, the student effected his retreat with a rather lame and impotent version.
But with you it's different, and she's on her dignity—riding her high horse.
These signs of docility caused Sir Lionel to relent and come down off his high horse.
First it's Mr. Peth, and now the captain's on his high horse.
I could see that she was troubled, and was trying to carry it off by riding her high horse.
You are in my power, Phil, and you had better come down from that high horse.
originally (late 14c.) "fine, tall horse; war horse, charger" (high steed is from c.1300), also, like high hall, "status symbol;" figurative sense of "airs, easily wounded dignity" in mount (one's) high horse "affect airs of superiority" is from 1782 (Addison has to ride the great horse in the same sense, 1716). Cf. French monter sur ses grands chevaux; "The simile is common to most languages" [Farmer].
To be on one's “high horse” is to be disdainful or conceited: “Sally got tired of Peter's snobbery and finally told him to get off his high horse.”