Why is "Lying dog-faced pony soldier." funny?

Political

Who it channels

Biden's strangest off-the-cuff insult.

Where it comes from

Biden aimed it at a voter at a 2020 New Hampshire campaign event; the phrase has no clear meaning, and Biden has attributed it — variously and unconvincingly — to an old film.

Why it lands

It is an insult assembled from four words that do not belong together. The humor is that it sounds like a real put-down while meaning nothing at all.

How to drop it

Lobbed at a friend who is plainly bluffing in a card game: "You lying dog-faced pony soldier."