In some rural areas of Mississippi there are places where "flush toilets" aren't available. The people in those areas have to use out-houses or as they're known in these areas "Mud Holes". They are usually a pieced together shack made of whatever odds and ends can be found in the front yard or that scrap pile at the end of the gravel road. once constructed a hole is dug to catch the leavings, thus creating the mud.
"oh man I really gotta go! Do you have a bathroom?"
to which is answered "Nope, just got that mud hole over yonder"
or
We were on a road trip down South when we got lost. Dave had to go really bad and ended up having to use a Mississippi Mud Hole behind some guy's house.
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)