-When a sophomore girl hangs out with and talks to all the freshman at your school.
-When an older girl is always dating the freshman guys.
Spencer: What's with Mary? She's been hanging with the freshmen an awful lot.
Anthony: Yeah, she just got out of a relationship with one and now she's talking to that other one?
Spencer: Mary's definitely got a case of freshmanitis.
it is when freshmen hang out with seniors who talk about senioritis, and they believe they have any reason to be sick of high school.
senior-omg only 3 1/2 more months of this crap!
freshman-what's the matter?
senior-i have senioritis.
freshman-i'm so sick of school. i have freshmanitis
(senior procedes to beat freshman)