Ok...may be we should start a lesson on Japanese vulgarities. The main purpose is not to promote the usage of it. But to foster better understanding for Japanese learner. I am a firm believer that not understand the outrageous part of a language one can never say that he knows that language.
I am still a beginner, so I don't know much, but I would like to compile a PDF file on this lesson. Hope everyone can contribute something.
Examples:
きさま=貴様 (an insulting/vulgar way of saying 'You')
てめ=てめえ (an insulting/vulgar way of saying 'You'. Generally gives a less sophisticated impression of the speaker than if he had used 貴様 instead)
やろう=野郎 ("fella" with a taste of disdain. The dictionary entry puts the translation as "rascal". Note that 野郎 might be used by males to describe guys in general with a hint of self-mocking. i.e those curt guys)
ちくしょ=ちくしょう=畜生 (literally "animal". can be used in a variaty of situation similar to the English Shit! or Damnit!)