Then you should define the meaning of "bugger" on the site. The beauty of this website is it serves as a platform for the Chinese community not just to learn English slang but also to share the slang you know at the same time. It is like wiki.
No website nor dictionary can define all the words, plus slang are highly regional, like "bum" means "homeless people" in North America, while it means "butt" in U.K. "Fanny" is ass in N.A. , but pussy in U.K and Aussie.