(A) To flow over the side of a container while boiling (inseparable)
1. The water in the pot is BOILING OVER.
2. I forgot about the rice and it BOILED OVER.
3. Turn the stove off before the soup BOILS OVER!
(B) To become violent or to lose control because of anger (inseparable)
1. The mere mention of a tax increase will make Kevin BOIL OVER.
2. Union members’ frustrations BOILED OVER in rallies outside their office.
3. Their talk BOILED OVER into an argument.