The act of thinking about football, soccer, golf, dead puppies, your mom etc etc during sexual intercourse causing a disruption in your exitement level and thus, not cumming as fast as you normally would (i.e. 1 minute)
Joe- I was about to cum while having sex with my girlfriend, but i had to resort to coitus procrastination since it had only been 45 seconds since penetration.
Mark- Awesome bro! I will start coitus procrastinating from now on!!
The aftermath emotional state after a meaningful ten minute relationship culminating in a vigorous and twat stretching bunk up from a male of the Sambo persuation, possibly spawning niglets 9 months later. For example, Tyrone Thundercock, OG T-Dog or Tyreese Longschlong (or multiples there of) unleashing their "twelve inches a slave-ness" upon a usually drunk white/hispanic/asian lady down a dark alley or behind a 7/11 after a night out.
Becky: OMG, Stacy. I just got boned by Twelve inches a slave Tyreese! After he left me in a sloppy head I had a real Post Coital Niggalation....
Stacy: you never learn though, do you?!