The extremely ugly, Hitler-like moustache worn by David Thewlis in the "Harry Potter and the Prisoner of Azkaban" movie, though it can apply to any such moustache.
Did you see that guy's lupinstache?! It's hideous!
Luminus is a beautiful person who you need in your life, they are there when everyone else isnt. They are perfect for when you need a shoulder to cry on, someone to talk to or someone who will play videogames with you. Luminus isnt perfect themselves, which is what makes them perfect.
Person 1: Omg my boyfriend just listened to me vent all nightlong Person 2: You should absolutely stay with him girl, hes a Luminus.