'SNL' Star Rips Shaq ... Your Undercover Video Is Lame!

1:52 PM PST -- Shortest beef ever?

We just spoke with Pete who says he was "obviously joking" and that he LOVES Shaq. In fact, the two hung out at the Justin Bieber roast last year.

He adds, "Plus, I would never offend a man that large."

Shaq versus ... Pete Davidson from "Saturday Night Live"?

Yep.

The comedian apparently HATED Shaq's undercover driver video he made for Lyft -- 'cause after we posted it on TMZ Sports, Pete swatted the clip down as "f***ing lame."

Pete posted his review on Instagram -- and, while he didn't mention Shaq by name, it was obvious what he was referring to.

"Hey you know what would be hilarious guys? If a really famous person went undercover as an Uber driver. Isn't that so hilarious and crazy!! UGH SO F***ING LAME."

So far, no word from Shaq ... but he usually isn't one to back down from a celebrity feud.