One who is a jingle nuts is a person that does something so stupid and asinine that you have no better word to call them. Pretty much synonymous with calling someone a clown. They have no idea whats going on and are the same sort of person that walks around with shitty toilet paper stuck to their shoe.
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.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"