It usually refers to Do-It-Yourself repairs or modifications. "Bubba" got to a lot of Enfield rifles by chopping off a few inches of the barrel, sanding the stock and shortening the handguards. It usually lowers the value of a rifle, especially military surplus and can take away from the historical value of the piece.
Its named after "Bubba", that guy you know who loves to butcher military surplus by spray painting a Mosin Nagant fire-engine red or nickel plating a M1919 and adding speed fins.
I've been hangin around the Milsup EE and I've seen a few people saying that there rifles have been bubba'd. What does this mean?
Thanks