Hillary Clinton has long been rumored to be a rather vulgar conversationalist when cameras aren't rolling.
According to a Washington Post piece about Mark Leibovich's new book “This Town,” then Secretary of State Clinton once said, “[Expletive] the White House Correspondents’ Association dinner.”
One assumes said expletive was an F-bomb.
The context here was the 2011 raid on Osama bin Laden.
The concern in the White House was that it might occur at the same time President Obama was scheduled to be at the dinner. To wit Clinton's response.
As it turned out, Obama gave the orders before the dinner, and the raid took place the following day thereby creating no conflict.
As for Clinton's sentiments about the dinner, they're not that different than former NBC Nightly News anchor Tom Brokaw's who said earlier this year, "[T]here was more dignity at my daughter’s junior prom."