'Redneck Island' -- Duct Tape + Back Hair = Dumbest Idea EVER

Take a bunch of rednecks ... put 'em on a desert island with a giant roll of duct tape ... and you get one of the most painfully stupid things you'll ever see.

We won't go into details here -- but let's just say people from the South can be extremely resourceful when it comes to unsightly body hair removal.

The clip is from a CMT reality show called "Redneck Island" that comes out next month -- think "Survivor" but with yokels.