Is "F off" different from all the other blasphemous stuff in Quebecois profanity? "Maudit sacrement" etc.? Pardon me if this is offensive, but I find offensive language very interesting (I wonder if TB censors Quebecois swear words...)
In Montreal, spraying a situationally appropriate, bilingual comet tail of curses in French & English is oft elevated to a poetically olympic sport.......in culture as in biology, the mongrel tends overwhelmingly to be healthier than the purer of breed. If cross cultural comparisons of curses interest you; delve into Hungarian.......they make the rest of humanity blush