CNN's DON LEMON started a TWITTER-FEUD with JONAH HILL over a supposed snub in Cincinnati last week.

--Lemon says he approached Jonah to tell him he was a fan, and Jonah pretty much blew him off.

--He Tweeted, quote, "Said hi to @jonahhill in hotel.  Think he thought i was bellman . . . A lesson to always be kind."

--Jonah shot back, quote, "I said hi what do you want me to do move in with you?  I was in a hurry.  Didn't realize you were a 12 year old girl.  Peace."

--Lemon replied, quote, "Hardly.  You're not my type.  But I know rude.  And you were."  (--Lemon is gay, FYI.)

--Jonah replied, quote, "I walked out of the restroom and found you waiting for me.  Shook hands, said hi and was on my way.  Sorry if you found that rude."

--But apparently, a "hi" and a handshake aren't enough for Lemon.  Because he then complained about the whole thing on the air.

--He said, quote, "Jonah Hill doesn't owe me anything, and he may have been having a bad day . . . but Jonah Hill treated me like the help."  (--In addition to being gay, Lemon is also black.)

--He also claimed that the handshake was, quote, "wet". 

(--We're not sure if he means that Jonah's hand was literally wet, or that the handshake was limp and not enthusiastic enough.  Either way, it sounds like this guy needs to get over himself.)

--He added, quote, "I'd been taught by mother to always be kind to people."

--He also called this, quote, "a fun thing, for me at least."  (--Check out video here.)