In addition to the above definition, which is almost correct, it also refers to a period in which fundamental views and opinions that the boy has which differ from the girl are ironed out and converted.
"I think girls with big titties are nice!"
"I THINK YOU'RE A SEXIST AND NOW I WON'T TALK TO YOU ANYMORE!"
"Oh, maybe that was wrong."
But there ain't nothing wrong with the big titties!
A Japanese acronym for YAma nashi, Ochi nashi, Imi nashi, which means, roughly, "No peak, no point, no meaning". It is a term used to describe purely sex-focused manga or anime. It is often used incorrectly as a blanket term to cover yaoi, shounen ai, tanbi, shota, and BL, as well as being (again, incorrectly) used as a synonym for gay.
That vendor was selling what was labelled as yaoi, but it was mostly BL.
To "So-own" someones noob ass. Also "Swned". To beat them so badly that a normal "Owned" just won't suffice. Often used in times of great satisfaction and superiority in Online games, namely "Counter-strike"
"John is bringing the swn to those bitch ass chinamen."
"I'm going to Swn those muther fuckers with my AWP"