a person who will always be there for you, and will love you no matter how many mistakes you make as long as you don't hurt her. is usually gorgeous yet not hot but is the best kind of friend you will ever be able to have.
A grind move when 2 people grind 1 person in the center. It is usually done by a girl in the center with 2 boys on the outside or 1 boy in the center and 2 girls on the outside. It is very pleasurable.