A heightened state of mind achieved just after the male orgasm. Effects include: Being able to finally understand your maths homework, logically deducing your life choices as well as understanding nietzsche.
Jack: "Yo Barney, how did Karl do so well in maths?"
Barney: "I heard he shagged Stacy before the test, it's probably Post Nut Clairvoyance."
Barney: "I heard he shagged Stacy before the test, it's probably Post Nut Clairvoyance."
by SmegmaBullet January 21, 2019