The ability that men possess that allows them to sense what is about to happen with their phallus. This ability is especiallypronounced when there is an imminent threat to the groin area, and when there are possible sexual opportunities nearby. Also very useful for sensing nearby wallsharks.
"Oh man, guarded my nuts just in time; would have been a disaster if my precocknition didn't work!"
Making a predicktion about future sexual pleasures is all well and good, but it can also warn if da "generous with his sausage" dude in question is gonna be a real you-know-what in his attitude and overall treatment of you.
To spend a large amount of time preparing oneself for a night out. This is the initial stage to "peacocking".
Etymology derives from the dominant beauty of a peacock's feathers. One who precocks has generally spent a large amount of time making oneself physically pretty for a night or an event.