1 definition by jennanaa

Top Definition
A common disease which plagues high school seniors at one point during their last year in high school. Before they graduate, they are overcome with a lazy and indifferent attitude; uncaring of their studies. There are many different causes of the disease, but it can often be contagious between close friends. Often results in a change in personal style; from anything beforehand to sweats and baggy shirts. Hair is barely ever brushed; or for women, is up in a messy bun or ponytail. They might have many absences and a generally dismissive outlook towards any type of labor whatsoever.
Senioritis: we'd fight for a cure if we weren't so lazy.
---
Susan: Hey, did you study for the English test?
David: Hahaha.. nope; House was on. What about you?
Susan: Nah, Mark came over and then we went out for Starbucks.. didn't have time or anything.
by jennanaa January 08, 2006

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