Stashing
Stashing is when you’re in a relationship with someone and you refuse to introduce them to your friends and family; mostly because you view the person as temporary, replaceable, and/or you’re an asshole.
Friend: “Hey have you met John’s parents yet? You’ve been together for months”
Stashee (or person being stashed): “No, I think he’s stashing me. We don’t have any pictures together either.”