Someone addicted to playing with their own nipples
Sally "My nips are rubbed raw and bleeding"
Tina "I'm telling you, girl. I think you're a nipaholic"
Sally "Maybe I should find a support group..."
A cat who is very addicted to catnip
Me: My cat is able to untwist the lid and open up the catnip jar himself.
Crazy Cat Lady: Sweety, your cat sounds like a nipaholic. If cats claw through the plastic cat nip bags, they're a typical cat and no need to worry. If they are able to open lids to get to it, you have a classic feline drug addict living in your house.