Gummin' up some nip

When a person with no teeth attempts to bite or 'gum' on a nipple, often for sexual purposes.

I would have went to that site if they we're hot, but I don't need to see ruthless toothless gummin' up some nip.

I would love to just bite on a nip but my dentures always fall out and I wind up gummin' up some nip.