It was an apparent typo in a tweet by US President Donald Trump, and internet users have been mocking him mercilessly.
"Despite the constant negative press covfefe," he tweeted just after midnight, Washington time.
And he then appeared to have gone to bed, without finishing his thought or correcting his mistake.
Although it seems likely the word he was reaching for was "coverage", social media users have been trying to guess other alternatives or motivations.
