If you just showed up at your dorm and found yourself lost in a sea of jargon, or you've been around for a few semesters and still find yourself firing up Urban Dictionary a couple times a day, here's a handy infographic and video guide from Dictionary.com to help out.
A few notable definitions:
Netflixer: An easy class
NARP: Non-athletic regular person
Traying: Sledding down a snowy hill on a dining hall tray
NCMO: Non-committal make out
Infographic provided by Dictionary.com.