As his tenure as US President comes to an end, Barack Obama has again taken taken part in a 'Mean Tweet' series that delivered a spectacular diss to Donald Trump.

The Jimmy Kimmel Live segment was recently aired and, of course, there was bound to be a Trump comment slipped in.

"President Obama will go down as perhaps the worst president in the history of the United States," wrote Trump on Twitter.

Obama replied: "Well, at least I will go down as a president."

Ouch.

Watch the full video here: