One who plays first person multiplayer online shooters and takes advantage of lag that occurs within the game to score easy kills and achieve maximum pwnage.
I hate that guy, He killed me like 8 times. He's such a lagbagger!
Used to describe the event in which an onlinepersonal user account has been hijacked without the user knowing, usually by a friend or aquaitance in a jovial or informal manner and whereby some obvious OR subtle change has been made to derive humour to a wider audience.
Dan: my user account said "Dan just went skiing and loved every second" but now it says "Dan is a gaylord and indulges in sweet love making with bald queens". Man, i just got logbagged!
or
Dan: awww bloody hell, i just got logbagged by Jonah... changed my profile picture to that picture of a dead horse
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.