Noun
senioritis (uncountable)
(US, Canada) A tendency of seniors in high school or college to skip class or slack off due to a desire to move on, or because they have already been accepted by a college and their further academic performance is no longer as relevant.
Welcome to Midweek Madness, where we cure ourselves of Senioritis with a dose of penicillin and get back to business. Source: Internet
Senioritis hit me real hard in high school, and I can’t afford that in college. Source: Internet