Ron White -- Selling Jim Beam to the Japanese is UN-AMERICAN!

EXCLUSIVE

You know you're a redneck if ... you swear to give up drinking Jim Beam and Maker's Mark for selling the company to a Japanese liquor brand -- which is exactly what comedian Ron White is doing.

The "Blue Collar Comedy" legend tells TMZ ... he's vowing to NEVER DRINK Jim Beam or Maker's Mark again -- after Beam Inc. (which distributes both) announced Monday it'd be selling the company to Suntory in Japan.

Ron explains, "It’s a goddamn shame! There’s not too many things American these days…hot dogs maybe, and bourbon. But them selling outside the United States is disappointing."

It's OK ... at least we still have Pappy Van Winkle -- if you can find it.