Also known as a sausage fest. Sword fights are parties with an overwhelming amount of males. What few females there are usually being cock blocked too. They develop when too many different cliques decide to show up, with few females being told of the party. Also, if two parties are being held at the same time, more or less one of them will turn into a sword fight, depending on which people the girls like.
I went to some dudes house party and it was a total sword fight. All the girls were either at the club or movies that night, and some other kids were cock blocking the girls that were there.