Pertaining to public bulletin boards, the act of accusing another poster of saying somethingnasty in a thread before that poster has even responded.
Mynah13 made a huge purpledebooboo when she claimed boris1976 called her a bitch without knowing that boris1976 is without an internet connection this week.
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.