A student of the 7th grade. They are students after 6th grade and before 8th grade. 7th graders think they're much more mature then they were in 6th grade, and think they're more mature then any other grade. 7th graders think they're better than 8th graders and everyone older then them, but are actually not. Try to follow into the steps of immature 8th grader, only then crashing down in High School.
8th grader: That little 7th grader annoys the shit out of me!