2. (noun) haven't you learnt your lesson yet? you should have known better, you'll listen next time, I told you so, I should have known better - an idiom used to comment on someone's mistake or oversight when they should have known better. In this usage iro is often preceded by a possessive.
Kua mau taku iro. Kore rawa au e kai waipiro me te whakatete ki te taraiwa i taku waka ā muri ake nei (HKK 1999:97). /
I should have known better. I will never drink and drive my vehicle ever again. /
See also e iro e iro!, kua mau [tō] iro