Baseball fans attending game four of the World Series on Saturday began chanting "let's go Brandon" at former President Donald Trump and former First Lady Melania.

Trump appeared to smile when he heard the now-infamous euphemism for the phrase "f*** Joe Biden."

The now-viral "Let's go Brandon" phrase began after a reporter mistook chants about the president from a NASCAR crowd as cheers for racer Brandon Brown.

DONALD TRUMP SEEN DOING TOMAHAWK CHOP AT ASTROS-BRAVES GAME WITH MELANIA


Several rap songs titled after the phrase have topped Apple Music charts in recent weeks. Bryson Gray's rap "Let's Go Brandon" fills the No. 1 spot on the platform. Two other "Let's go Brandon " songs by Loza Alexander are in Apple's top 10.

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The former presidential couple attended the World Series game between the Houston Astros and the Atlanta Braves, in which the Braves took the victory and now lead the series with a 3-1 record.

Trump was also seen at the game joining in with Braves fans doing the controversial tomahawk chop celebratory gesture.