Kenyon Martin Rips NBA Jerseys -- No MAN Should Wear Sleeves!

Kenyon Martin doesn't just think those special sleeved NBA jerseys are ugly ... he thinks they're emasculating -- telling TMZ Sports they belong in the WNBA!

The New York Knicks star was leaving Greystone Manor this weekend ... when we asked how he felt about the sleeved unis NBA teams had to wear during the Christmas Day games.

"I think they're WNBA jerseys," Martin said.

"I had to go with it, it's the job, you got to wear the company uniform ... so, it is what it is."

He adds, "It's all about money at the end of the day ... do I agree with it? No. Do I understand it? Yeah."