When a good student is put in the back of the class to set a barrier or wall between the reject kids who were put there. The student is only there because the teacher doesnt want to deal with the stupid kids anymore, and good student suffers from it.
Boy 1: My grade is totally dropping in math because I can't see the board anymore. Mrs.Smith totally backseat fucked me.
Boy 2: I understand! Ever since I was was moved to the back in history to provide a wall between the slackers, I havent learned a thing