noun:
someone who is unbelievably perfect; ruins your image on how most people are; makes you believe that most people are unworthy because there is someone like him/her around

Noun; Someone who is constantly making your ovaries explode and one look can make you pregnant. Someone who can intoxicate an entire fandom.

A non-excuse for not playing a video game with all your friends while also not wanting to give an actual, legit reason why.

Someone who constantly ruins your life with their perfection, and smiles while they do it

someone who constantly is ruining your life.
and smilies while they do it.

Something or somebody that destroys your life beyond repair, like drug addiction, unplanned pregnancy, or being disfigured.