Apparently nobody knows anything about this song:

Feelin' low, cuz I know that it's all over now
And nobody cares for what happens anyhow
There's no use to cry
Cuz life passed me by
It meant for me to lose when I was born.

Dad's the only person I ever heard sing it - I have no idea whose song it is. Or... I imagine the title is "Feelin' Low," but I don't know that, even. I googled every pair of words in there -- nothing. Actually, I didn't spell "cuz" as I have here.