This is another way of saying "I do not agree" and can be used when strongly opinionated.
Riiley - "I don't think it was dog at all for Oliver to Steal Zoe from Brad.
Nick - " I beg to differ. It's actually fucking dog"
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."
A nerdy way of saying "what you said was bullshit"
Guy1: 2+2=4
Guy2: I beg to differ
A political way of saying that someone disagrees with something they say.
I beg to differ about Mr Johnson's final assertion.
Definition: I beg to differ is a word used by dimwits who think they always know what's going on.
Example:
Joe: Hey I don't think that's true
Jane: I beg to differ
Joe: No like it's literally on their website saying it isn't true.
A way for crossout players to tell eachother its time for gay sex
"Ey bro, my bumper begs to differ~"