Considering other typographical errors found in the text, I'm not entirely convinced that the use of "fug" was not an error in the text of Half-Blood Prince. What do you think?
It is clearly an error. The OED, for example, has no definition that even approaches sensibility when used in that context. Nandesuka 12:47, 18 July 2005 (UTC)
It looks that way to me as well. "Fog" would make much more sense. JulieKahan (talk) 18:04, 11 February 2013 (UTC)