Kris Humphries has developed some thick skin since Kim Kardashian filed for divorce -- because he barely batted an eye at Madison Square Garden tonight ... when the entire stadium erupted in a chorus of boos.
You gotta see the clip -- Kris subs in ... and the disapproval from tens of thousands of Knicks fans is DEAFENING.
It's Kris' first game back after he re-signed with the Nets this week -- a one-year contract worth a reported $8 million. Who needs Kardashian money now?
6:32 AM PST -- When asked about the soul-crushing boos after the game, Kris sarcastically told reporters, "I was so focused on the game, I couldn’t hear that, bro."