a derogatory term for students of the freshmen class (highschool or college). a 1st time repeat freshmen is a refried fish, a 2nd is a burned fsh, and a 3rd(one who should be a senior but still retains freshman status) is a fossil.
"why's scott a sophomore? he's 20!"
"oh, scott, he's a fossil. even the fresh fish think he's dumb."