What it means in English:
The Korean word used to address one's younger siblings.
In K-Pop context:
The right for fangirls to look at their favourite idols and call them 'oppa' (refer to previous slide for more information) and be doted on by their idols.
A few artistes, such as singer Lee Seung Gi whose debut song 'Because You're My Girl' was aimed at older ladies (also known as 'noonas' in Korean), was given the title of 'Nation's Dongsaeng'. Actor Yoo Seung Ho - who debuted in 2000 when he was just seven years old and has been active since then - and singer IU, known for her cutesy, child-like persona, were also referred to as the nation's dongsaeng.