Shaquille O’Neal just came through in the clutch for one of his biggest fans … making a special shoutout vid for his bar mitzvah — and TMZ Sports has the vid!!!

We’re told 13-year-old Adam Huczneker had a Lakers-themed celebration over the weekend … and the kid’s uncle wanted to make it extra memorable, so he DM’d the NBA legend asking for a quick message.

Not only did Shaq agree, he sent a video going all-out with every Jewish phrase he could think of — even wishing the kid a Happy New Year.

(Shaq may not have known, but he isn’t too far off on his well wishes — the Jewish New Year is September 6, so it actually works!)

Look, he may not have said all the right things, but Shaq certainly gave it his all … and we’re told everyone in attendance absolutely loved it!

Mazel tov!!!