nii-sama

A very respectful way of addressing one's older brother (in Japanese). Same as "o-nii-sama" or "aniki". Similar in meaning, but showing even more respect than "nii-san" or "nii-chan".

A younder sibling to his/her older brother: "I'll do as you say, nii-sama."

by Guidorff the Biscuit King December 02, 2009