The act of killing a loved one or friend in order to trick your evil overlord into trusting you completely and or believing that you are their ultimate agent.
n. An ambiguous character in the Harry Potter series. He teaches the Potions class, speaks mostly in a whisper and snarls a lot.
In the books, he is a thin, spider-like man with a large hooked nose and greasy black shoulder-length hair. He wears billowing black robes and pretty much dislikes everyone.
In the movies, he is Alan Rickman in a non-wizardy but completely adorable outfit.
Fangirl: Aaaahhhhh! Cuteness!
Snape: Silence!
Fangirl: Sevvie-cakes!
Snape: DO NOT CALL ME THAT!