Girl 2: What? Why!?
Girl 1: You only make friends with the smart people so you don't have to think of stuff on your own.
Girl 2: I'm sorry!
Example B: Uhura doesn't stop nagging me to go to the doctor, what a brain digger.
Example C: I was at Chekov's party yesterday, and there was this brain digger there that didn't stop talking to me. Eventually I just left.