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The aftermath or "afterfap" of your masturbation session. The usually brief and heavily awkward moment right after you had a pleasurable orgasm where you now have to deal with a huge load of regret for beating your meat along with the irritating "clean-up" process involving you waddling like a penguin to the nearest tissue box.
God fucking damn did I feel guilty as fuck during my post-fap, but ends sure did fucking justify the means because I literally cummed higher than Old Faithful.
post-fap by GoldEvil911 July 26, 2014
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Post Fap Clarity 

When one comes to his senses after fapping and ceases to think with his dick
Guy 1: Dude, did you text Katie?
Guy 2: No
Guy 1: Why not?
Guy 2: When post fap clarity kicked in, I decided not to text that bitch
Post Fap Clarity by poizunman December 31, 2011

post fap nap 

When you get home from a stressful day and need to relax, so you bust one out and take a sweet nap right afterwards.
"Yesterday was so stressful I had to have a post fap nap just to relax."
post fap nap by hyjack September 2, 2016

PFG (Post-Fap Guilt)

The guilt and/or depression felt after masturbation due to the material used, the method used, etc.
Man, fuck PFG (Post-Fap Guilt).
PFG (Post-Fap Guilt) by Zalixar November 18, 2009

Post-fapdom Depression

The feeling of disappointment/guilt right after fapping
Mom: What's wrong with jimmy?

Son: Oh nothing, just Post-fapdom Depression

ex post fapto 

A series of habitual tasks undertaken upon the completion of a fap.
I always close my porn tabs ex post fapto.
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Brent: he just tossed me a slop grenade
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