Answer: senioritis

AnswerCrossword Clue
SENIORITISCause of teen torpor
SENIORITISHigh school grad-to-be's "illness"
SENIORITISAlmost-grad's "disease"
SENIORITISHigh-class affliction?
SENIORITISCause of slacking off at school
SENIORITISMalady that typically worsens in the spring
SENIORITISCertain drop in motivation