When Wieden brought the “Just Do It” slogan to Nike, he didn’t reveal his inspiration for it. If he had, we’d bet Nike’s $47.81 billion that they would have never green-lit it.

But if “Just Do It,” Brown’s new song with Ferg, is any indication, the Celtics star and 2024 NBA Finals MVP clearly has some scores to settle — particularly with Nike.

More Nike Sneaker News Watch: Nike drops 40-second chilling video for the Kobe 9 "Halo". News: LeBron James' Nike sneakers make a political statement.

Nike stock was down just over 3 percent on Tuesday, at $79.60 a share, but it's too early to tell how it will ultimately fare. Nike did not immediately return ABC News' request for comment.