To pull a Pieter-Jan'etje

Verb. 1: To fuck the bff of your crush under the light of a thousand stars and nut exactly at midnight.

2: An ancient ritual performed by the Maya to not become a werewolf.

1: Do you still have a relationship with your crush Jessica?
2: No, it was full moon tonight. I didn't want to turn this time and destroy the whole village again. So I had to pull a Pieter-Jan'etje.