Kris Humphries is a no-good wedding gift HYPOCRITE ... so says Kim Kardashian's BFF, who claims he dropped $5,000 on a special marital gift for Kris ... but the NBA star has still never offered to give it back.

TMZ spoke with Jonathan Cheban ... Kim's close pal who's often featured on the Kardashian reality show ... who tells us he gave wedding gifts to both the bride and the groom .. with Kris receiving a $5,000 gift card to YSL.  Not too shabby ...

Cheban says he was down to let Humphries keep his gift when the marriage went bust ... until Kris criticized Kim's post-split gift policy. Now, he's demanding Kris return the card ASAP. 

We broke the story ... Kim decided to keep all of the gifts because she believes it's proper wedding etiquette. And for good measure, she cut a check to the Dream Foundation charity for TWICE the monetary value.

But Kris felt that wasn't good enough ... and believes Kim should send everything back to the guests.

Cheban tells us ... as long as Humphries has the YSL card, he's in no place to judge ... and should keep his mouth shut ... telling us, "Kim did the HONORABLE thing."

Jonathan Cheban is backing off from his threats to sue Kris Humphries ... saying the idea has "caused me a lot of problems already."

Cheban had been contemplating suing Kris for $5 million after Kris called him "gay" on TV.

But Jonathan has had a change of heart -- perhaps brought on by his run-in with a Kris fan last weekend -- and says he has no hard feelings toward Kris.