The kids who are new to high school; often seen with backpacks that are three times the size of themselves, they take the longest routes possible to their classes, and they attract other freshmen. Once they have become comfortable with the high school society, they are usually the loud and obnoxious people screaming at each other and chasing their friends around the hall. Sometimes they get high school mixed up with middle school.
*really loud group walking down the hall*
Friend 1: "Why do they feel the need to be so freaking loud?"
Friend 2: "They're freshmen. Can't you tell by their backpacks?"
Friend 1: "Oh yeah...I remember when I was in eighth grade."