its when two or more peopleshake Christmas bells next to each other, making a dingle sound, since two people are creating the dingle noise, the term then becomes Double Dingle
a computer configuration whereon two dongles are required to simultaneously sniff and spoof trafic on a communications bus such as that of zigbee wireless
Paul Asadorian had to use a doubledongle to sucessfully fuzz on Larry Pesce's zigbee interface
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.