Steve: Isn't that jon?
Catherine: OMG! He is a limblicker!!!
Steve: What!? Really?
Catherine: He was the one who sent the porn video of himself licking Jessica's limbs.
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.