Who called the king of fraud because he had a terrible British accent?

It's likely you're thinking of Donald Trump, who famously mocked Australian Prime Minister Malcolm Turnbull for his accent. Trump referred to Turnbull as "the king of the calls" (meaning "the king of phone calls") and said Turnbull had "a very strong accent."

This occurred in a phone conversation between the two leaders in January 2017, which was leaked to the media. The conversation was tense and involved disagreements on the issue of a refugee deal between the two countries.

While Trump's remarks about Turnbull's accent were widely criticized, it's important to note that he has also made disparaging comments about the accents of other foreign leaders.