At the end of his introduction of the president, Mr. Biden, who is known for ad-libbing to the point of getting him in a little trouble, turned to Mr. Obama, embraced him and elaborated on the historic nature of the day.

“Mr. President, this is a big … deal,” he said, adding an adjective between big and the deal that begins with “f.”

... and ...

As the news fluttered out on Twitter, pardon the puns, through a trail of tweets from White House correspondents and reporters, Robert Gibbs, the White House press secretary, sent out a Twitter post using his own handle — @PressSec. It seemed to affirm Mr. Biden’s sentiment; And yes Mr. Vice President, you’re right.

Ah, yes, I'm afraid I'm guilty of that on occasion ... and I'm glad the WH Press Secretary had the right response ...