"
Every girl is capable of murder if you hurt her
Watch out you, don't push me any further, any further
You're not the only one walkin' 'round with a loaded gun
This little girl is capable of murder 'cause you hurt her
What this means is that when you break up with a girl and go straight away to another one, don't be surprised that she will want revenge, hence the part "Every girl is capable of murder if you hurt her".