Attempting to quote from memory a short, famous passage or pledge in front of lots of (millions of) people and screwing it up royally.
Barry: The Chief Justice tried to swear me in at the ceremony without a notecard and fucked it all to hell! Some people think it was MY fault!
Michelle: Oh, don't worry baby. Everyone knows he was pulling a Roberts.
Pulling a Robert is when you are depressed and you post on multiple social networking sites that you're gonna kill yourself but you actually aren't and you are just looking for attention attention whore
if you will
Bob on twitter : I should go kill myself
Jim: what's wrong?
Bob: oh nothing, I just want attention, no one ever listens to me
Jim: Oh! So you're pulling a Robert?
when your playing a video game, and run off a cliff for no consernable reason.
guy 1: i see someone to the left.
guy 2: ah, dont mind him, he keeps pulling a robert, focus on the other dudes