Snooki -- Bye Bye Beamer, Helllllllllooooo ESCALADE!

Another big breakup on the "Jersey Shore" ... this time Snooki has kicked her BMW to the curb in exchange for a much BIGGER ride.

TMZ has learned Snooki just drove off the lot of a Long Island Cadillac dealership in a brand new Escalade.

One source close to the Snook tells us Snooki's new ride came with some pretty sick black alloy rims (pictured above).

After the deal, Snooki went to her Twitter and wrote, "Bye beamer, my poor frankie, love you always!"

No word on how much she paid for the car -- but it probably doesn't matter much ... those kids are frickin' loaded.