Mottainai!

This is a phrase that is apparently common around the world, according to a friend of mine. It is a Japanese word that means regretting wasting. At least that is how I interpret it... It has another meaning though.
So, when I told him that I had no idea what on Earth it meant, he sent me a link and I learned a lot.
Since I am interested in Japanese, I try to learn as many words as I can. Now this word, is one of those words you can't stop using. Well, for me that is... ^^
Anyway, thanks Yuma for sharing this with me!