The US President simply tweeted the word “democracy” late last night, causing one user to share the post and ask if he had been hacked.
It comes after several companies sent out one-word tweets on Thursday night.
The trend looks to have started by US media company CNN just after 4.30pm.
The company simply wrote “breaking news”, causing the tweet to go viral.
So far, it has racked up more than 159,000 likes and over 21,500 retweets.
Following suit, The Washington Post wrote “news”, Amtrak tweeted the word “trains”, while Sports Central wrote “sports”.
The social media game also hooked NASA in on the fun, with the company’s account tweeting: “universe”.
The French Embassy US also got in on the trend, writing: “revolution”.
The account then posted a follow-up tweet asking “Are we doing this right?”, alongside a list of other one-word tweets by companies.
President Biden’s “democracy” tweet has so far reached over 201,000 likes and almost 24,000 retweets.
It caused one user, Antonella Guerrera, to share the tweet and ask: “Has even @potus account been hacked…??”.
While some people believed the original tweet was made as a mistake, others believe it was a deliberate social media strategy.
Despite speculation from some Twitter users, Mr Biden’s account is not believed to have been hacked.
Of course, this isn’t the most famous tweet by a serving US president.
A prolific tweeter, Mr Biden’s predecessor Donald Trump, who is now banned from Twitter, once caused a stir after the seven letter post ‘Covfefe’ appeared on his feed.
On May 30, 2017, Mr Trump tweeted: “Despite the constant negative press covfefe.”
It led to newspaper reports questioning what the phrase meant – and even has its own Wikipedia page.
It appeared six minutes after midnight (EDT).
The tweet gained intense attention as it went viral.