Warren Sapp -- What, Me Worry? ... Hits Fishing Tourney After Dom. Violence Charges

Warren Sapp won't let a little thing like allegedly beating, stomping and biting his GF keep him from having a good time ... 'cause days after he was hit with criminal charges, Warren went fishing.

TMZ Sports has learned ... Sapp participated in the 5th Annual University of Miami Sports Hall of Fame Celebrity Dolphin Tournament over the weekend, laughing and smiling with U of M cheerleaders.

The tourney raises money for various charity organizations ... and Warren actually hosted the tournament in 2012.

Still, considering Sapp was charged with 3 counts of domestic violence on Thursday ... it was interesting that he showed up ready to fish just 24 hours later.

Warren hasn't issued an official statement about the charges ... but he definitely sent a message this weekend -- he's not letting it bother him.