An unproductive farmer, for whatever reason.
While the farmers in the valley grew many fruits and vegetables, the rocky slopes above made the growers up there little more than dirt farmers.

Or:

Prior to widespread irrigation, prairie agriculture in North America was mainly dirt farming.
by Word Worm September 10, 2009
One who places the penis in another's dirty anus (Dirt Farm)
He's definately a dirt farmer
by Scott June 6, 2003
One who likes anal sex raw and unprotected and brags about it.
He was digging deep in her back door, what a dirt farmer! He took that girl dirt farming in her back door.
by Ekim71 May 24, 2009
To dig, plant, nurish, grow, eat, and live naturally off the land.
That dirt farmer grow's the best organic's I've ever tasted. Dirt Farm or die. Life is a garden, dig it dirt farmer. Dirt farmers get dirty and get strong naturally.
by dirtydoc April 25, 2015
the worst job in the world you spend your whole day kicking the floor so dust comes up and you collect and you are paid 1p per kilogram.
'' i work on a dirtfarm all day''
by gangsta boi August 16, 2005
from the dirt as in he is a dirt farmer.
That dirt farmer sure surfed good today.
by Anonymous August 16, 2003