Am I fat at 175 cm tall and 83 kg?

Okay, I'm a sixteen year old kid and I was playing Starcraft II with my friends and we wound up playing against this team of guys who were absolute jerks and then eventually they started calling us fat. I put in my height and weight and then they started laughing and saying that was fat. I never thought myself as fat and I've never been this self conscious before, so were these guys right to think me as fat? Or were they just trying to put us down in game?