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."
Madjack
A person that is a brony.
That guy is obviosly a madjack.
MadJacking
Thats when a person jacks off repeatedly all day. For an example when you are in prison and the dude watching the lady in the booth jacking all day you would say that niggas been madjacking all day.
When you are in prison and the dude watching the lady in the booth jacking all day you would say "that niggas been madjacking all day."