The act of losing something and doing without it for a long time, then having it again but forgetting to use it. Being spoiled we are used to having things. The opposite is true here with reverse spoilage as we get used to NOT having things.
I like to listen to music while driving in my car. 30 years ago my car radio was stolen, and so during the process of getting a new one, getting the money from the insurance company and picking out a replacement stereo, I got accustomed to driving around quietly. Once I got the stereo, I forgot to turn it on due to the reverse spoilage.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.