A, Uhm
A programmer's way of saying 'what the hell are you talking about?' or 'you're an idiot and I'm too lazy to explain it.'
A: What's a loop? B: Uhm... you're not a programmer, are you?
A: Uhm... why is the sky blue? B: I'm not your science teacher.
A: Uhm... this code is garbage. B: Thanks, I needed a confidence boost.