Schefflasaurs, meaning "chemistry dog lizard" (from the Greek Scheffler meaning 'gigantic load of homework related ions that growl at people' and sauros/óáõñïò meaning 'lizard'), is a deprecated genus of sauropod dinosaurs.
Person 1: Hey man, wanna chill afterschool?
Person 2: I can't... I've got to deal with a brutal schefflasaurus tonight.
Person 1: I'll get the caffeine pills.
This term isn't used to refer to someone with Narcissistic Personality Disorder (NPD).
Warning: usage of this word makes you look like an idiot if female, or like a douchebag if male. In any case of gender, this may cause the reaction of "what the fuck?" to appear.
Girl 1: OMG I absolutely ADORE my hair right now, it's teased just the right way and I didn't even have to put in more than two hours on it this morning!! Did I mention I have SUCH a great bod! I'm GORGEOUS!
Girl 2: what a narcy.
Girl 1: OMG NO IM NOT, BITCH!
Girl 3: WTF?
In a classroom/graded setting, one relies on the current postitive status of their grade, using it as a buffer in hopes to get to the end of the grading period doing little or no work with mild to no consequence.
Similar to how a tank in an MMO can rely on buffs to stay alive in a mob, a mob being in this case either a class or a giant-ass homework load.