Vice Prez Joe Biden

Drops the F-Bomb

3/23/2010 2:32 PM PDT BY TMZ STAFF
And he did it on live television!

Before President Barack Obama's health care reform signing today, VP Joe Biden turned to the Commander in Chief -- and with the microphone on -- whispered to his boss, "This is a big f**kin' deal."

White House Press Secretary Robert Gibbs must agree. He just Tweeted: "And yes Mr. Vice President, you're right..."