You know who likes fist bumping? The Obamas. This 2008 photo shows the then Democratic presidential candidate getting a knuckle bump from his wife before a speech. (Craig Lassig / EPA)
Once in office, President Obama continued with fist bumps when greeting his audience. (Charles Dharapak / Associated Press)
The president isn’t the only politician who does it. Here, Sen. Cory Booker (D-N.J.), left, offers up a fist bump at the Capitol in Washington. (Saul Loeb / AFP/Getty Images)
Actors do it, too. Peter Dinklage of HBO’s “Game of Thrones” greets a fan with a fist bump. (Kirk McKoy / Los Angeles Times)
