Mad Jack 

The dark and evil counterpart of Samurai Jack. He only appeared in one episode called ''Jack VS Mad Jack''. Mad Jack is a badass, a samurai, an illusion, a clone and a master of all fighting skills. He is also mysterious and rowdy.

Mad Jack is cool but he's so angry

Mad Jack by CollectorofSouls November 11, 2014

Mad jacker 

A person who jacks off

That dude is a mad jacker.

Mad jacker by Gotaday May 29, 2017

Mad jackin' 

When someone is on Facebook, via mobile device. This can include but not be limited to: updating Fabo status, Facebook stalking, changing profile pic, etc. Does not include Twitter, Myspace, nor Xanga due to gayness of said sites.

Abbey was mad jackin' all during psych class so now her phone battery is low.

Mad jackin' by jakeyjake8872 June 3, 2011

Mad jacker’s syndrome

A guy or gal that is addicted to masturbation especially while on meth.

David had ‘mad jacker’s syndrome’ and almost went blind, but he’s recovered now!

Mad jacker’s syndrome by Papi_chulo_OG November 14, 2025

madjacker 

An individual who violently jacks off every time he (or she) experiences mental frustration.

Do you know how I know Dave is a madjacker? He has signs over his bed with arrows pointing towards him that say "madjacker."

madjacker by Chris Frosh October 20, 2007

Madjackass 

To shrug someone off in a manner which leaves them unable to retaliate effectively, most frequently by responding to a poorly-structured/purely subjective argument with a simple "no."

"<pointed, yet asinine question>"

"I'm going to have to invoke a Madjackass on this. No."

Madjackass by Gault April 3, 2005

Madjack 

A person that is a brony.

That guy is obviosly a madjack.

Madjack by Anonamos February 19, 2013