Barack Obama Gatecrashes 'The Colbert Report', Brilliantly Delivers A Special Edition Of 'The Word'

With the final episode of 'The Colbert Report' due to air on December 18 - Stephen Colbert is off to take over from David Letterman, of course - it seems only right that the big guns are appearing during the show's final weeks.

And they don't get much bigger than the leader of the free world - who made a memorable appearance on the show on Monday night, deadpanning his way through the regular segment 'The Word' (although he changed it to 'The Decree').

"Nation: as you know, I, Stephen Colbert, have never cared for our president," reads Obama from the autocue.

"The guy is so arrogant I bet he talks about himself in the third person."

And so it continues - chiefly about Obamacare - in very amusing fashion.

As Colbert himself would put it: a tip of the hat to you, Mr President.

Check out more of Obama on Monday's 'The Colbert Report':