Bro
A male aging from 18-24 years, wears Birkenstock sandals, upside down visor or baseball cap with pre-frayed brim also watches Family Guy and plays ultimate Frisbee. Usually in a fraternity, older version of a prep.  
Joe: Hey you missed the party last night, where were you?
Tom: Just screwing around, how was it?
Joe: It sucked because there were a million bros there.