'Golden Sisters' -- 3 Times Twerkier than Miley Cyrus

Remember the Golden Sisters??? Those grandmas who got famous for their play-by-play of the Kim Kardashian sex tape??? Well, now they're TWERKING ... and TMZ has the footage.

FYI, their names are Mary Bartnicki (82), Josie Cavaluzzi (74), Teresa Dahlquist (74) ... and their Kim K video was so huge, it landed them a reality show on the Oprah Winfrey Network.

Now, they've got Miley Cyrus' twerk video in their sights ... and they LOVE IT.

Don't worry ... no hips were broken in the making of this clip.