It's obvious to me. Smiley Burnette had a frog in his throat.
(Caused by "Post Nasal Drip!" -- I used to think that was a breakfast cereal! But it's not. It's snot!
Wow, I sure got a ton of mileage out of those lines on nights I had to sing with a cold. Then I'd attribute the song to the pop-folk group called the New Crusty Nostrils.