From Shoryuken.com:

Prima Nocte/Nocta/Noctis is a term that, scientifically put, means the king gets to tap any chick on their wedding night first aka first DIBS. “It Is My Noble Right.”

What’s the association with John? I have no idea, but apparently it’s there, and everyone on SRK knows about it.

And it’s on his stick.

So, uhhh… I guess this means John plans on having sex with your fiance when you decide to marry her. Just FYI.

Next time you see him, ask him what it means, because I sure as hell don’t plan on it.