Acting like Lindsay Lohan; in an insane manner, doing crack, attacking people in their cars, and being a little bitch about going to jail...oh, and being impossible to insure in whatever your career is because you're so. fucking. insane.
This is also known as the Lindsay Lohan epidemic, which has spread rapidly in Hollywood, as well as in middle and high schools.
B is doing crack. She must have a whole lot of linsanity.