NICOLE RICHIE’s baby-daddy, rocker JOEL MADDEN, acted sleazy and made folks queasy when he swaggered into an MTV Movie Awards gifting suite swarming with celebs, wolfed down greasy pizza slices – then pawed through the freebie designer swag with his goopy paws.

“It was gross,” said My Spywitness. “Joel’s fingers were all icky and greasy from the pizza. He ate about five slices while he picked through stuff like jeans and lingerie, but no one wanted to say anything.”

NOTE TO NICOLE: Joel groped bras, panties and thongs, so why didn’t he bring any home to you, hmmmm?

But here’s the good news: He did grab a bunch of pet products for your three dogs!