I've come to realize, in middle age, how I often utter gibberish syllables when getting up from a sofa or chair or reaching down to pick something up. One recent day, while picking up a pen I'd dropped, I'm pretty sure I said, "Neef! Noff! Snorf!"
I wonder if the composer of "Eep, Opp, Ork, Ah-ah!"' had such an experience before crafting that song for "The Jetsons."