A haircut that consists of both the mullet and mohawk styles.
T: I'm getting my haircut today.
N: Oh really, what are you getting?
T: A MullHawk...
N: A Mullhawk? Whats that?
T: It's when your hair is short in the front and longer in the back and at the same time is longest in the middle. You know
a mullet/mohawk combo.