There are plenty of English words that mean "nonsense."
One of them is "malarkey." It's certainly fun to say, and it got a lot of attention when Vice President Joe Biden, in his debate with Sen. Paul Ryan: "With all due respect, that's a bunch of malarkey."
University of Michigan English Professor Anne Curzan, who specializes in linguistics, says while "malarkey" sounds like it's Irish in origin, there's no clear answer about where it comes from.
"When it first shows up in U.S. English, it shows up in Irish-American usage. It shows up in the 1920s, and it shows up in cartoons by Thomas Aloysius Dorgan, who is of Irish decent. It also showed up in sports writing," Curzan says.