Mark Memmott

"With all due respect, that's a bunch of malarkey," Vice President Biden said during Thursday's debate as he challenged Rep. Paul Ryan's assertion that U.S. foreign policy has unraveled under President Obama.

A little later in the debate, Biden said Ryan's criticisms were "a bunch of stuff" — and when moderator Martha Raddatz asked "what does that mean?" he said, "we Irish call it malarkey."

Biden's use of the word has many asking: Where does it come from?

"U.S. consumer sentiment unexpectedly rose to its highest in five years in October as consumers became more optimistic about the economy in a possible boost to President Obama's reelection hopes," Reuters reports.

Vice President Biden and his Republican opponent, Rep. Paul Ryan of Wisconsin, had a lively debate at Centre College in Danville, Ky., this evening — one marked by Biden's aggressive challenges to many of the Republican vice presidential nominee's claims and Ryan's oft-repeated message that the Obama-Biden administration's policies aren't working.

The discussion was steered by ABC News' Martha Raddatz. It's the only vice presidential debate of the campaign.

Just as they did before, during and after last week's presidential debate, the fact checkers will be up and running for tonight's vice presidential debate:

Tell us you can resist clicking on this headline from Florida's Sun Sentinel:

"Huge Eyeball From Unknown Creature Washes Ashore On Florida Beach."

It's big, it's blue and the newspaper says "among the possibilities being discussed are a giant squid, some other large fish or a whale or other large marine mammal."

The Florida Fish and Wildlife Conservation Commission has sent the eye off for study.