Blótsyrði: Cussing & Slang

http://badukk.livejournal.com/5843.html Slang and colloquial phrases

A gold mine of words that others fear to print

http://hildur-edda.blogcentral.is/blog/2009/3/11/islensk-blotsyrdi-sett-a-ensku-d-haha/

http://en.wiktionary.org/wiki/Category:Icelandic_swear_words Swearing.

http://en.wiktionary.org/wiki/Category:is:Vulgarities Vulgarities

http://en.wiktionary.org/wiki/Category:is:Slang Slang

http://slangur.snara.is/ On first look, this looks like slang in the sense of rare neologisms that tend to be synonyms for the same short list of various taboo things. It is also user contributed, so it likely has some of the weaknesses of urban dictionary, where users are coining words on the spot or otherwise being unscholarly in the research.