Top Definition
1. A person who interupts a conversation , either real life chat or on a computer and takes over the conversation thus killing the former convo thread and turning the attention of those interupted to the interupter.

2. Any one who takes a funny picture , thread joke ect from some one and posts it claiming it for there own before the original owner can post it.
Guy 1 " Hey man I was watching Tv last night and cought this show , the walking dead have you ever seen it?"

Guy 2 "No but i heard it S---"

Chat Jacker "Omg I saw a TV show on whales last night !! whales are epic blah blah blah!!!"

Guy 1 and 2 "Bro we been chat jacked
by Kdashfirestarter March 19, 2012

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