by Sherri Waters June 19, 2008

Almost immediately after beginning to tell a story, you are interrupted by someone who begins to tell their own story of how the same thing happened to them. The interrupter continues to talk about themselves, and they never ask you about your story as if it never happened.
"I began to tell Stephanie how I almost got into an accident today, but she started telling me how she almost got into an accident as soon as I started my story!Then she just kept talking about all the accidents she almost got into in her life and never asked me about my accident. She's such a conversation Jacker."
by Dre7179 January 8, 2015

by lasd December 13, 2008

Noun, program used to detect aimbotters in halo pc. SJing someone was a common term of the bot infestation that happened durring patches 1.06 and 1.07. n00bs would often insist that they had sight jacked a player. the alleged aimbotter would then be kicked/ banned by server admin, typically the player was innocent.
sight jacker halo pc:
n00b: xXyuNtOcHabLE is botting I SJd him ban his ass!
xXyuNtOcHabLE : yeah right that kids just a n00b and im pwning him!
xXyuNtOcHabLE quit
Admin: botter has been kicked
n00b:hahaha lmfao i was jk im the real botter
n00b quit
n00b: xXyuNtOcHabLE is botting I SJd him ban his ass!
xXyuNtOcHabLE : yeah right that kids just a n00b and im pwning him!
xXyuNtOcHabLE quit
Admin: botter has been kicked
n00b:hahaha lmfao i was jk im the real botter
n00b quit
by architype X November 29, 2011

Someone’s who masterbautes 5 times or more per day. They are often bored and have nothing else to do and have a really large sex drive.
1: Have you heard about John?
2: What?
1: He’s a serial jacker and hasn’t left the house in days. I wanna go visit him to see how he is.
2: What?
1: He’s a serial jacker and hasn’t left the house in days. I wanna go visit him to see how he is.
by Justicewithtacosandweed August 8, 2018

by Field Playa October 29, 2010

Jim: Hey bob, why did joe lose his girlfriend?
Bob: She said she caught him jacking off over world of warcraft.
Jim: Dang, what a pixel jacker!
Bob: She said she caught him jacking off over world of warcraft.
Jim: Dang, what a pixel jacker!
by Annonnnyyymouseee!? June 3, 2009
