This (https://genius.com/Dr-john-junko-partner-lyrics) transcription I found is pretty spot on, but with a hole in the center right before the break I can't fill.
Sounds to me like "moujee farm" but that's meaningless as best I can tell. Moody farm, moody phone, not sure.
As for the meaning of Junco partner, I've always assumed it was a "junkie partner" - ie, someone to do drugs with
Down the road come-a Junko Partner
Boy, he was loaded as can be
Boy, he was knocked down, knocked down loaded
You know he wobbled all over the street
Singing six months ain't no sentence
Thought that one year ain't no time
They got boys up on Ponderosa
Servin' nine to ninety nine
If I had, if I had, if I had, a million dollars
Just-a one million to call my own
I would buy me the land around Parish Prison
And I would grow me a (big doobie farm)?
Alright
Down the road, down the road, down the road
Here he comes, Mr. Jones
Whoo boy, you're on your back so hard
Got to say lordy-ho
If a penny make a nickel, a nickel make a dime
A dime will make you half, a half will make a dollar
Make you ha-a-a-ller
Give me whisky
When I get a little frisky
Cus it's-a mighty good drink
When you get a little dry
Give me tobacco-o-o
When I get a little sickly
But give me heroin
Before I die
Down the road, down the road, down the road
Come Junko Partner (Partner, Partner, Partner)
Boy he was loaded as can be
But he was knocked knocked knocked, he was knocked out loaded
Don't you know he wobbled, yes, all over the street