1.to suddenly become uncool or unpopular (SEE: Geek, Nerd)
1.to ruin something, or make it useless
1.That jock got melvinized last week, and now hes hanging out with the nerds that go to the library during lunch to playrunescape 2.The nerd who found the holy grail drank from it, and nobody longer wanted it because it was melvinized
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.