While president, Duterte got incensed when Obama criticized his bloody campaign against illegal drugs and told him in one speech to "go to hell."
In 2015, he shocked the dominant Roman Catholic Church when he fired off an expletive while expressing his disgust over a monstrous traffic jam that trapped him while Francis was visiting Manila.
"I wanted to call: 'Pope, you son of a b---h, go home. Don't visit here anymore,'" he told a mob of supporters, some of whom laughed.
He later apologized after Filipino bishops expressed shock and outrage.