Mike Tyson's showing he ain't scared of Jake Paul ... giving him a couple shoves during a press conference for their upcoming fight -- and laughing all the while.
The heavyweight boxing legend came face to face with the Youtuber-turned-fighter at Fanatics Fest at the Jacob K. Javits Convention Center in New York City Sunday ... and, when they come together in the center, Tyson gives Paul a quick left to the chest.
Tyson and Paul exchange words before they start moving back toward each other ... where Tyson full-on shoves JP -- cracking up at his 27-year-old opponent.