I listened to several sound samples of Muddy Waters singing GARBAGE MAN, and this is what I heard:

My baby, she run away with the garbage man.
Yeah, you know, my baby, she run away with the garbage man.
Please come back to me, so you can empty my garbage can.

I don't know where this little girl been, and I don't know where she going.
I don't know where this woman been, and I don't know where she going.
Please come back to me, woman. My garbage can is overflowing.

[According to some sources, this song is attributed to Willie Hammond.]