1 definition by Christer van der Meeren
Saying "I beg to differ" means you disagree with something, or generally just are of another opinion. Originally a somewhat formal expression, it's commonly used now in less formal circles.
Person 1: "Opera is way better than Firefox; it looks a lot better."
Person 2: "I beg to differ, you can customize Firefox just the way you want."
Person 2: "I beg to differ, you can customize Firefox just the way you want."
by Christer van der Meeren May 15, 2007