"Plain folks" is a noun phrase. It refers to ordinary or average people in society.
It's plain to see that you have never used the word plain in a sentence!
Just Plain Folks - 1916 was released on: USA: 20 January 1916
Just Plain Folks - 1918 was released on: USA: 26 October 1918
Just Plain Folks - 1936 was released on: USA: 13 March 1936
"You're watching Major League Baseball today, folks!"
I'm going to go check up on our folks at the outpost.
The cast of Just Plain Folks - 1918 includes: Dorothy Dane Bobby Vernon
I don't want to go to the old folks home. This question is a sentence with the word "folk" in it.
Scottish people speak English so a Scottish person would say: just plain folks.
Just Plain Folks - 1936 is rated/received certificates of: USA:Approved USA:Passed (National Board of Review)
The plains in South Texas continue into Mexico.