Sometimes an important decision needs to be made, but sometimes a woman is involved and can affect a gent's decision making process - essentially he starts to think more with his cock and less with his head.
In this scenario it's time to make a PWD, or Post Wank Decision. This is the act of knocking one out, taking five minutes then approaching the decision with a clear mind - And ultimately making the right decision!
Chez: "Dude, I really don't know if I should take the bitch back; I mean she gave great brain on the regular, but is that a good enough reason to take her back?"
Nobby: "Mate, you need to take a Post Wank Decision on that shit! Clearly you don't want your wee man taking decisions for the big man."
You are about to wank and you have been thinking about a girl that wants you, but just doesn't meet your standards. Just before wanking, you decide to text her something dirty because u are thinking "She's not that bad , I'm gonna shag her" - she doesn't reply - and after wanking, you experience regret for sending the text when you were horny.
The intense feeling of shame and loneliness one feels after a hefty wanking session. Tends to be at its worst if the act has been committed in the middle of the day on a weekday, when how pathetic your life is really hits you.
Jeff: Yhhh man i had a serious case of the post-wank blues yesterday, it dawned on me that i should have a job and not be wanking over midget porn