The older people in high school(usually 11th and 12th graders) that think they have the right to leave out freshmen, treat them like they don't matter and always telling them to fuck off. They also tend to get lazy as fuck and party their dicks and pussies all night long on Fridays and weekends.
Guy 1: Hey dude can you please take me out to that party that's going on this Friday?
Guy 2: Dude, what grade are ya in?
Guy 1: Freshman...
Guy 2: HAHAHAHA!!! I'm part of the upperclassmen!!! Fuck outta here dude!!! Go home!!!
by AdomC October 04, 2015
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10th, 11th, and 12th graders. Most of which make fun of 9th graders.
Upper Classmate: Yeo freshmeat!

Freshman: uhhmm.. *quivers*

upper classmen
by Danielle d. l. August 19, 2008
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