Well, I'm Scottish, so there's no way I could fill just one post detailing all the weird slang we have. So instead I'll just talk about cunts.
If you're in Glasgow, it's possible (and somewhat common) to be called a cunt in a complimentary way. It's entirely dependant on context though, as it can also be used as an insult exclusively used towards men. This seems to be much more common in Glasgow than other parts of Scotland though, so I don't recommend calling someone a lovely cunt in Aberdeen, for example, unless you really know the person well.