Obama Romney debate
President Barack Obama (L) shakes hands with Republican presidential candidate Mitt Romney after the debate at the Keith C. and Elaine Johnson Wold Performing Arts Center at Lynn University on October 22, 2012 in Boca Raton, Florida. The focus for the final presidential debate before Election Day on November 6 is foreign policy. (Photo by Michael Reynolds-Pool/Getty Images)(Photo by Michael Reynolds-Pool/Getty Images)

President Barack Obama and former Massachusetts governor Mitt Romney squared off for their final debate of the 2012 campaign on Monday, and Obama came armed with several lines that got social media (and traditional media) talking (“horses and bayonets” trended on Twitter for hours during and after he debate.) Here are Obama’s five best “zingers.”