Someone that dislikes life, or has the tendancies to cut them selves; see emo.
"Life Haters" are commonly found at: The Local Skate Park, Hanging In Main Street, Piercing Shops. ETC
To check if someone is a Life Hater, look for cuts on their wrist, if the cut is parallel to the arm they are a "Life Hater". If the cut id going along their wrist, they are just try hard attention seekers.
Johnny: "Woah, check out that guys facial piercings"
Den: "You see the cuts on his arm aswell"
Matt "Man he hates life"
Johnny, Den (Simioultainsly) "TRUU, What a "Life Hater"