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Manjack: an individual of either sex, or any age in the Caribbean (Barbados) dialect.
E.g. Every manjack had better pull up his socks and do what he has to do; or else.
manjack by blackberryjuice August 26, 2013
Related Words

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
1(mat-jack)
usualy a nick name, or the name of a large ammount of gothic peoples

2 the firstname and second put together of someone to make them sound like a baddass person, but in actuality nonone cares
yo lets go to matjcks house

matjacks a screw ball
matjack by anthony marra April 18, 2008
A turd so large that it contacts the bottom of the U-bend while still emerging from the unfortunate crapper's anus, causing him/her to be literally jacked up off the seat. There is a particular risk of manjack when using toilets of the curious German or Austrian design, which have the U-bend at the very front of the pan and a shallow "deck" for inspection of stools.
"How long are you going to be in there?"
"Sorry, got a bad case of manjack and I've run out of toilet paper".
manjack by Zog The Undeniable February 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
urban legend. fictitious homosexual pervert who preys on young boys. name originates from his favorite action to perform on his victims.
two boys in the gym shower after playing sports

tom: "oh shit, i think i cut my dick up."
henry: "you better cover that up, here comes manjack."
manjack by howisya May 1, 2004