Horses must be known for truthfulness."I heard it from the horse's mouth"
? Umm the horse doesn't speak English. Hello?
"Don't look a gift horse in the mouth.""I heard it from the horse's mouth"
? Umm the horse doesn't speak English. Hello?
"I heard it from the horse's mouth"
? Umm the horse doesn't speak English. Hello?
Mister Ed Season 1 Episode 1 (1961) The First Meeting
I think you should start a lexicon of updated idioms."My way or the highway"
Couldn't we have picked a differing rhyming word here to make more sense?
For example "My way or the deathray"