Well! First of all answering like this, FOff i mean isn't nice and it's positively not something u want to tell your either boss or a girlfriend, or anybody relationship with whom you value, that's kinda rude and mean, but sometimes it may be the only way to let somebody know they are not welcome... a lot, and sure the F word is bad, but F off does nothing with sexual activities))) it's like "get lost" nd I guess the latter would be better, the same meaning but without obscene lexics

This is an offensive term meaning go away. Unless you want your head punched in, don't use it publicly.

I'd say "bug off" instead.

It considered bad & rude if you say it to someone. Plus, it reflects badly on you as well.

it means "get out from my sight" or "get lost", and it's obviously a BAD WORD! try to say this and your mouth will bleed.... hehehe.. :)