UFC superstar Mauricio "Shogun" Rua was robbed at gunpoint -- by 4 scumbags with shotguns -- during a recent trip to Brazil ... taking his car, cash and even his CLOTHES. Rua's manager Eduardo Alonso told Brazilian media ... Rua was driving back to his hotel following a dinner with friends in…

Jon "Bones" Jones -- who has a huge UFC fight tonight in New Jersey with Shogun Rua -- just subdued a robber with an awesome fighting move -- TMZ has learned. Jones was doing what has become his ritual before a fight ... he was meditating at a park in Patterson, NJ when he heard a woman scream,…