There are a lot of similarities between American English and British English. There are also a lot of differences, and these are a lot more fun!
BBC America is helping smooth the linguistic pathway, with its list of “10 Stinging British Insults”, only one of which is reproduced below as the rest are NSFW.
A recent addition to the canon, and a rather grand one. At first, minger simply referred to ugly people. As beauty is in the eye of the beholder, there’s not a human born who won’t have been called a minger at some point or other, even David Beckham (although probably not very often). However, the word also means disgusting, so yes, you can be David Beckham, you can be admired for your looks from here to way over there, but if you’re eating yesterday’s takeout from the garbage with your fingers, you’re a minger.
To further expand your insult vocabulary, head over to the article at BBC America.