My guess is that humans have an inherent compulsion to shout random shit while riding a horse. It’s the same impulse that makes us raise our hands and shout “WOOOO!” on a roller coaster.
The yip part of yippee is old. It originated in the 15th century and meant “to cheep, as a young bird,” according to the Oxford English Dictionary (OED). The more well-known meaning, to emit a high-pitched bark, came about around 1907, as per the OED, and gained the figurative meaning “to shout; to complain.”
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Yippee came about after yip . The earliest record of this exclamation of delight is from 1920 in Sinclair Lewis’s novel, Main Street: “She galloped down a block and as she jumped from a curb across a welter of slush, she gave a student ‘Yippee !’” …
Now how about the whole phrase, yippee-ki-yay ? It seems to be a play on “yippie yi yo kayah,” a refrain from a 1930s Bing Crosby song, “I’m An Old Cowhand.”
Do cowboys really say this? We’re guessing probably not, unless of course they’re single-handedly (and shoelessly) defeating a gang of bank robbers on Christmas Eve.
Nonsense words??? As you surmise, they were different languages! My grandfather used “Sooie!” when calling pigs, which comes from the Latin word for pig, and he used “Sook!” when calling cows, which is a Scottish pronunciation of “suck”. Chickens aren’t very multilingual, so he just shouted “chick, chick, chick” for them.
He no longer had horses when I was a kid, but it wouldn’t surprise me it he had shouted “Yippee ki yay!” back then, too.
Haywire Mac is also credited with writing “The Big Rock Candy Mountain” and “Hallelujah, I’m a Bum,” a parody of “Revive Us Again.” Mac was also a Wobbly.
We also used “Sooie” when calling our pigs, but we had no idea that it came from Latin. We used “Bossie” when calling in our milk cow for her morning or evening milking. Don’t think that was Latin, but who knows?
The chorus of the original runs
“Hallelujah! Thine the glory!
Hallelujah! Amen!
Hallelujah! Thine the glory!
Revive us again.”
Mac’s version:
Hallelujah, I’m a bum!
Hallelujah, bum again!
Hallelujah, give us a handout
To revive us again!
There is some debate whether Mac wrote it, but I believe he eventually got the copright. As they say, “there was a lot of unprotected music around in those days.”