The act of a man writing with his penis as a quill whilst using vaginal fluids (normally during the female's menstrual cycle) as ink.
Also notable is the similar act of brown quilling with the difference of faeces being used as ink.
The rare phenomenon where it is felt essential to fully commit to any girl that one comes within a 5m radius of oneself. Often occuring in cultures of high desperation and alcohol, it was originally used following the mating patterns and rituals of a type of bird known as a Quaile.