Feet In The Concrete, means that your feet hurt or they are tired after a long run or a marathon ETC.
Ive got feet in the concrete man.
My pencil that I had for two weeks. I miss him terribly he was my pal. We traveled around the world together. Then he got lost. Somewhere somehow, he is hopefully in a better place now... :( R.I.P 2019-2019 haven't seen him since last decade.
"Feet stains did a good essay today!"