Hijacking someones facebook post with meaningless off-topic banter.
D: Q&A on ABC is awesome. Debate polly-ticians. Debate!

M: Mmm Polly-waffle

D: Did you just Post-jack?
by Meshies May 17, 2010
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Post-Jacking: Going way off topic on a Facebook post in lieu of normal human communication in an attempt to up one's cool factor.
That asshole Chuck is going way too far on my post! He is not as cool as he thinks he is! He should be arrested for Post-Jacking
by JamminJimmy July 5, 2010
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Post jacks syndrome is a disease that is common after jacks teen evolution.It’s highly contagious among roscommon teenagers from ages 14-16.
Symptom’s include:

flu like illness
tonsillitis
hangover

tan dysmorphia(more common in females)
fatigue
acne (caused by the 20 pounds of makeup on all of our faces)
loneliness

slight depression

In extreme cases you might wake up in 3 different relationships and 7 new talking stages.
Symptoms usually last around a day and a half and there is no cure found.
Yeah lad i’ve some mad post jacks syndrome after last night
by daniel o donnell April 17, 2022
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(n.) Similar to "Liquid courage."

After just having masturbated, the feeling of being able to call up that girl you've always wanted to go out with but were too chicken-shit to do it before. Often short lived.
I finally called Emily last night while I was still hyped on post-jack courage!
by DownloadFailed November 6, 2011
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is when a man after ejaculation gets into a horrible mood. Very common with middle aged men.
I think my boyfriend has post-jack (post ejaculation frustration) in the morning.
by sachimiprimi May 20, 2011
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After a serious drama in someones life, said person goes to relieve themselves of the problems that have occurred recently. Through a serious amount of rubbing yourself and waiting to ejaculate.
Friend: Yeah, he has had a lot of issues lately
Stranger: Yeah, his mom just died recently.
Friend: Wouldnt be surprised if he wasn't Post Traumatic Jacking right now.
by WhatDoYouDefiine April 27, 2015
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