In this video from BBC America's Anglophenia Channel, former children's presenter Kate Arnel presents some common British swearwords and explains their origin.
Learners of English should use swearwords very sparingly, and probably not at all. They risk sounding silly or giving offence unintentionally. However, it's always useful to be able to understand swearwords, which are a common part of everyday language.
BBC's America's Anglophenia ("British Culture with an American Accent") consists of a blog, a YouTube Channel (where you can find all the other videos), and a Facebook page. Although the basic aim is to explain British culture to Americans, these resources are great for learners of English at intermediate level or above.