Bad news for Mark Ballas ... you're going to get your ass kicked -- courtesy of UFC superstar Paige VanZant.
Paige joined the guys on the "TMZ Sports" TV show (airing Friday on FS1) -- when she told us her "Dancing with the Stars" partner really believes he could last 1 MINUTE with her in the octagon.
So, Paige says she's calling his bluff -- insisting Mark has agreed to put his money where his (soon-to-be bruised) mouth is and square off with her ... a la Turtle vs.