Commen term for someone obsessed with the Naruto charecter, Sasuke, derived from the word, Narutard. Often the rivals of Narutards, or just plain dosen't understand them.
When a person becomes emo, evil, cool, sensitive, strong, edgy, sexy and avenging at the same time, betraying your friends in the process to get a personal achievement
Usually happens when the person discovers something terrible about themselves or as a consecuence of a childhood trauma.
Jimmy just discovered that he is adopted, so he did a sasuketation and ran away from home to search for his real parents and kill them for abandoning him.