Shaquille O'Neal -- I'm Jealous Of My 15-Year-Old Son

After 4 championships, 15 All Star games, and a bajillion dollars ... Shaquille O'Neal says there's still another basketball player he's jealous of -- his 15-year-old son.

The Diesel was DJ'ing a party for the MyVegas casino app when we asked about his stud of a son Shareef ... and what it's like to watch everyone freak out over the hoop skills of a different O'Neal.

Check out the clip -- Shaq keeps it super real ... saying that there are times he's a little jealous of his offspring ... mainly because the little O'Neal got famous much quicker than the big one.

He should also be jealous of Shareef's shooting ability ...