'Don't want it.' = M.J.: "'Iranai'. A slight problem. Lit: 'I don't need it', it's a very ungracious way of refusing something. Closer perhaps to 'I don't want it' in English. 'No thanks' has the same brevity, but not quite the same rudeness, as the Japanese. It's a kid's word mostly, in the sense that kids are allowed to use it because they're assumed not to know better. When you get older you adopt a politer way of refusing, though people of course will go on saying 'iranai' to anyone inferior or intimate."