I would HIGHLY suggest that you NOT use it! It is considered vulgar. It is used as an adjective and has the sense of "incredibly"

Personally, I think fucking is one of the most important and coolest words in the English language. As with all swear words, you have to careful who you use them around, but so many people swear that it's useful to know and use. Learning how to use it well takes time and practice. I'd be happy to teach you if you're looking for a teacher. If not, I would suggest watching some R-rated American movies to start...they have a lot of swearing. ;)

depends on if youdoing it or not