In a taped segment that aired last night, Obama got in an appeal to millennials to vote on November 8 and shamelessly plugged his accomplishments as president.
But Colbert, in the guise of clueless office manager "Randy," was not impressed.
"55. Tough time to start over for a man," he said, looking over Obama's resume.
"I don't see any promotions for the last eight years. That's not always good. Can you explain that?" Colbert asks.
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Obama gave no hint about what he actually might like to do after vacating the White House in January, but he seemed in no hurry to leave the political scene.
"You know what I really love doing? Is encouraging the youth of America to get out and vote this November so that the good work that we've done over the past eight years can continue on into the future," he said.
Obama didn't say who they should vote for, but when Colbert gave him a choice between "an extra fiber nutrient bar, which has traveled to more than one hundred countries, or this shriveled tangerine covered in golden retriever hair, filled with bile that I wouldn't leave alone with the woman I love," Obama said: "I think I'll go with the fiber nutrient bar.