Someone that's into "extreme" sports such as down hill mtn. biking, BMX, motocross or anything that you can get "rad" with. A flat brimmer will wear a ball cap with a flat brim with Oakley sunglasses and can usually be seen drinking a Monster Energy drink. A flat brimmer will think he or she is better than the rest and loves to pose for photographs.
by Surlybob March 16, 2015

A small private school that has it's focus on attempting to be a sports school or a theater/arts school, yet managing to be neither at the same time. It's a place where the rich spoiled K-12 graders go to school for the sole purpose of excluding those who do not wear designer clothes, play sports, or own an iPhone.
by Someone-Who-Knows January 17, 2011

A small private school who says they care about their students but the second an issue comes up they don’t do anything.
by sadboyhourss June 01, 2020

"Dude last week I was pounding my girl and really had to pee..."
"Oh you sick dog you gave her a brimmer"
"Oh you sick dog you gave her a brimmer"
by Dunn and Duff June 15, 2021

by High Dude Whats Good May 27, 2022
