A common hairstyle of an emo person, male or female - the hair is cut short and angled in the front, longer in the back, with lots of layers and rather shaggy. A variant is the reverse emo mullet (short in the back, long and angular in the front - Davey Havok of the band AFI sports one of these.)
Hair Stylist: How would you like your hair cut, Mayer?
Mayer: I was thinking of something like an "emo mullet."
Stylist: *raises eybrow*