Vulcan sideburns
A person who is unable to grow facial hair in the form of sideburns, so opts instead to grow the hair over their ears slightly longer than the rest of their hair.
Guy A: What's up with that Emo kid's hair
Guy B: He can't help it. It's Vulcan sideburns, man
Guy B: He can't help it. It's Vulcan sideburns, man