LOL! MC HAMMER ACCUSES JAY Z OF STEALING HIS SWAGGER!

Hip-Hop has-been MC Hammer is coming down hard on Jay-Z with a music video that disses the Brooklyn mega-star.

The video for "Better Run Run," released Monday, accuses Jay-Z of being an impostor and stealing Hammer's "swagger."

The video by the "U Can't Touch This" rapper also shows a man impersonating Jay-Z -- in a white T-shirt and a Yankees cap -- running from a Devil-like figure.

"I can see it in his eyes, the boy sold his soul. Devil said, 'I'mma give you the world.' I'd take it, plus give me a girl," the rapper says in a sly reference to Jay-Z's wife, Beyoncé Knowles.

What's behind the beef between the '80s icon and the superstar? Apparently, some remarks by Jay-Z in a new Kanye West song, "So Appalled."

"And Hammer went broke so you know I'm more focused/I lost 30 mil so I spent another 30/'Cause unlike Hammer 30 million can't hurt me," Jay-Z rapped about Hammer's money woes.