Stephen Merchant created the game with friends, John Krasinski and Emily Blunt, for their entertainment at parties. When Merchant was a guest at Jimmy Fallon' show they played it, then it became a segment on the show, followed by a tv game show in 2015.
LL Cool J - Host:
Do you know what bag it up means?
Emily Blunt: It's something filthy. She
Emily Blunt: told you I'm cheap.