Also note that slang and curses are not on the same level in different cultures. For example the most common curse word in US is almost TV-news-acceptable. But

Also note that slang and curses are not on the same level in different cultures. For example the most common curse word in US is almost TV-news-acceptable. But in Sweden I heard it's totally unacceptable to use most common curses. In Russia it's also totally unacceptable to say the most common one on TV news, despite major part of population cannot say a single phrase without it in casual setting.