The two sexagenarians aren't ready to rumble in the ring themselves so they're calling in seconds to do their sweaty work for them at the WrestleMania 23 event Sunday -- coincidentally April Fool's Day -- with the loser agreeing to have his head shaved by the winner.
According to World Wrestling Entertainment's Web site, Trump will be represented by ECW world champion Bobby Lashley, while McMahon will use Intercontinental champion Umaga. "Stone Cold" Steve Austin will serve as special guest referee.
The two talked a little "smack" Wednesday at Trump Tower, where a barber chair sat alongside the podium.
"I can't wait to see the look on his face (after Lashley loses to Umaga)," said McMahon, who made his fortune in the professional wrestling entertainment industry. "I'm going to snatch Donald Trump, strap him down into this chair, and shave his head!"
That set the tone, with Trump responding.
"This morning, I was asked by a major television station if Vince McMahon and I are friends," said Trump. "We used to be... ."
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