go off, I guess

slang A sarcastic phrase that accompanies evidence used to dismiss or deride something that someone has said. A: "I'm so excited about my A!" B: "Well, you only got an A because of the grading curve, but go off, I guess. A: "Yeah? Well, I once ate 25 hot dogs in less than five minutes!" B: "Wow. Go off, I guess." Go off, I guess. What a hardship it must be to live off your parents' money and not have to work.