Laughing awkwardly with his eyes lowered, Lemon asked his fellow host how he knew the words to the series about a black family living in a public housing project in Chicago.

“You know I’m black on the inside,” Cuomo responded.

While Lemon appeared to skip the comment, it was quickly picked up on the Twitterverse.

“It’s f–ing offensive,” tweeted Sister2Sister magazine managing editor Aisha Staggers, who said that “Black is not a costume.”