: 'Shit' is very common and not very offensive, just like 'fuck'  
 :: Yes, the usage of the "shit" and "fuck" aren't as profane when used in French as when they are used in English. I'm pretty sure that I've seen a show on which someone used "shit", "fuck" and even "fucké"as in "fucked-up", or "screwed-up", it's milder version.