"It's not always enough to lean in because that s-- doesn't work all the time", she reportedly said.
Obama was outlining her view that women can't have equality in both their marriage and professional life at the same time when her potty mouth kicked in.
"Thankfully I get more (and more regular) sleep these days", she said. Alright, I'm back now. "But sometimes that stuff doesn't work".
She apologized and said.
But some people took offense to Obama's unintentional cursing, calling her "classless".More news: Pompeo warns of escalation risk as Iran conducts missile test
Mrs Obama pioneered a number of initiatives during her eight years in the White House, with a special focus on children's nutrition and health.
"I love it. She can say whatever she wants now".
"Thank you [Michelle Obama] for being so real about the pressures we face as working mothers and reminding us all that just being ourselves is more than good enough!" one person wrote on Twitter.
Michelle Obama greets pupils at an event at the Elizabeth Garrett Anderson School in London.
"I thought we were at home, y'all", Obama said, according to Vanity Fair. It spawned a nonprofit bearing the same name founded by Sandberg and hundreds of "Lean In" circles, groups of women who meet regularly to discuss Sandberg's advice.
So sure, we should talk about the myriad ways in which women are discouraged from displaying ambition, but there's a lot more we need to talk about alongside it.
"But we do fear that Lean in's main message - which emphasises individual action as a way to address gender inequality - may lead people to view women as having played a greater role in sustaining and even causing gender inequality". "As much as I wish that could happen in four years, I don't think that's a likely time period but I think it can happen sooner than we think. I think we too often suffer from the tyranny of low expectations".