The act of ejaculating, so many times during a period of time such that you do not feel the desire to ejaculate anymore.
MARY: Hey, John, I'm back for reading week, let's have sex
JOHN: Naw, sorry babe, I've been using my right hand for the past hour, and I'm all jacked out.
by GHOST_ February 23, 2006
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To leave work unannounced with no warning. To sneak out before the appropriate end of the work day.
Daron said he is going to Jack Out today at 2pm so he can go golfing.

Dude, I am going to Jack Out of here as soon as the manager steps away.

John just Jacked Out the back door.
by TheInsideMan July 31, 2009
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Jacking off while hanging out with your bros
Danny: God, why can't I just hang out with my bros and jack out!?
Arin: I love to jack out with my bros!
by Kipst3r November 21, 2015
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a term used by Megaman enthusiasts instead of "jack off"
PET Trainer 1: Megaman jack out!
PET Trainer 2: Woohoo!! Free show!!
by Aroxor31 July 10, 2008
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Drinking three or more shots of Jack Daniels in the course of a minute, with the intent of getting black out drunk
Walking up to the bar, ordering a Jack Out (three shots on Jack Daniels at once). After the shots arrive, lining up the shots and having a single person take one right after another.

Note: Chaser in between shots is optional
by P 2008 May 30, 2008
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When the awesomeness of Jack White (musician) overwhelms you to the point where you can only see white.
The amazing performance by the white stripes gave me a Jack White-out
by BluesFan0421 June 27, 2011
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