i got this one , good to know , thanks dude !

It's slang that isn't accepted as part of civilized society. Some people may say it with their friends once they get a little older or in situations that really require a display of emotion. There are people that use it off-hand, but they would not do so in any academic/high profiled social function or around children. It can be used for: a) A cry if you hurt yourself b) To show displeasure with someone (fuck you) c) To show that you regret something happening .. like say you forgot to hand an assignment in d) In a LOT of hurtful or offensive ways A lot of middle-aged to adolescent people will use it commonly though.