NBC reporter Kelli Stavast was left red-faced interviewing Brandon Brown at Alabama’s Talladega Superspeedway, when fans began chanting "F**k Joe Biden".
Unfortunately for Stavast, she mistook the abuse for them shouting "let's go Brandon!" in support of his race victory back in October.
The phrase quickly became a meme among the American right-wing, with politicians and even the NRA getting involved, posting tweets gaining thousands of likes.
A prank caller even got through to Biden at The White House, and unaware of what the jibe meant, said he agreed with it.
Sign up for our newsletters here.