Floyd Mayweather isn't waiting until Dec. 25 to put on his Santa hat -- the legendary boxer gave a group of 5 kids $1,000 each as a Christmas present after the Clippers game!!
TMZ Sports is told ... Mayweather met with the kids following the Clippers' 113-93 victory over the Celtics at Crypto.com Arena on Monday ... and made their day unforgettable by surprising them with some holiday cash.
The video is really adorable -- the kids were ecstatic that Mayweather, who they refer to as "Uncle Floyd," chose to hook them up with the dough .