This is great...Shaq paid off a random guy's engagement ring!
The Big Diesel explained how it all went down on "NBA on TNT" on Tuesday night ... saying he was in a Zales in the Atlanta area on Monday shopping for some earrings when he noticed a man was stressing over a bill.
"I was like, 'You know what? Tell your girlfriend I got her,'" Shaq said. "'I'll take care of it.'"
Shaq added, "At first, he didn't want to take it. He was like, 'Man, I can't do that.' I said, 'Don't worry about it. I do it all the time.' I'm just trying to make people smile, that's all."
The two then posed for a photo -- and it was all really freakin' awesome!!
The best part of the story, though? Shaq says he had an even MORE generous act at a furniture store recently, paying off a bill there for a sweet family.
So cool of him!