An angry irrational woman, usually a soccer mom, that doesn't have any rational or logical tactics in an arugment, so she will yell "LAWSUIT! LAWSUIT!" in a crow-like voice in order to get people to do what she wants. Hence: Lawsuit bird.
It is rare for a lawsuit bird to actually go forth with a lawsuit.
I was raised by a lawsuit bird, so I usually got any class I wnated in high school because the schools feared a lawsuit.