Obama blasts Clinton and de Blasio's 'CPT' joke: It stands for 'jokes that white people should not make'

President Barack Obama skewered a bad joke told by New York Mayor Bill de Blasio and Democratic candidate Hillary Clinton in which the politicians, who are both white, poked fun at "CPT."

“Sorry Hillary, I was running on C.P. time,” de Blasio told Clinton when she criticized him for taking a long time to endorse her earlier this month

CPT is known as “colored people time” and is a reference to the stereotype that African Americans run late to an event or a traditionally black event not beginning on time.

Obama fired back during the White House Correspondents' Dinner on Saturday by blasting the joke.

"I was running on CPT," Obama said, when the event started a little late. "Which stands for, jokes that white people should not make."

Watch the video, as posted online, here: