Colin Jost Reveals How That Wild Vagina Joke About Wife Scarlett Johansson Went Over

The "SNL" star was forced during a recent "Weekend Update" segment to compare his wife's vagina to a roast beef sandwich.

“SNL” star Colin Jost is finally sharing how that racy “Weekend Update” joke in December went over with his wife, Scarlett Johansson, whose vagina he compared on-air to a roast beef sandwich from Costco — to raucous laughter from the audience and himself alike.

“Scarlett was genuinely so shocked,” Jost told Jimmy Fallon on Monday’s “Tonight Show.”

The recurring segment in which Jost and his co-star Michael Che write jokes for each other — and then have to read them aloud no matter what — left Jost as stunned as his wife, who was backstage during the broadcast and reacted with a facial expression for the ages.

“I was obviously surprised by everything, but they gave her a heads-up,” Jost told Fallon. “They were like, ‘Hey, would you be OK if Michael made a little, like, kind of vagina joke at some point?’ And she was like, ‘Sure!’ You know, ‘Whatever, I’m open to it.’”

“I didn’t know where it was going, and then the graphic came up for [Costco],” he continued, prompting audible laughs of recognition from the audience. “So Scarlett is backstage like, ’Oh my God! That’s what it is?!”