What does this saying me i just want to know?

ok 2-day in geometry i was just taking my notes & i was talking 2 my friend & my teacher was like brit 4 the love of god!! i dont want to here ur voice 2-day! but yet again the whole cl was talking. i just want to know what people mean when the say 4 the love of god cuz people say that 2 me alot! thanks 4 the help =)