jacketeer
"dude #1: how much you guys wanna bet that freshman wears his team sweats to the party tonight?  worst jacketeer in history
"a high school or college athlete - often times a football, lacrosse, or baseball player - who won't go out in public without sporting his team gear
""dude #1: how much you guys wanna bet that freshman wears his team sweats to the party tonight?  worst jacketeer in history" What is the definition of "jacketeer"?