books.google.fr - GET D!RTYNext time you're traveling or just chattin' in Japanese with your friends, drop the textbook formality and bust out with expressions they never teach you in school, including:•Cool slang•Funny insults•Explicit sex terms•Raw swear wordsDirty Japanese teaches the casual expressions heard...http://books.google.fr/books/about/Dirty_Japanese.html?hl=fr&id=InhPAPMAk2oC&q=yoroshiku&utm_source=gb-gplus-shareDirty Japanese