팔은 안으로 굽는다고 · 팔이 안으로 굽다
people naturally side with their own; blood is thicker than water (lit. arms bend inward)
Example
팔은 안으로 굽는다고, 엄마는 늘 제 편만 들어요.
Blood is thicker than water: Mom always takes my side.
Word parts
An arm only bends inward, toward your own body, never outward: people naturally side with those close to them.
Good to know
Pronounced [파른 아느로 굼는다]. Used to point out or excuse bias toward family, friends or one's own team. This 굽다 'to bend' is regular (굽어요), unlike 굽다 'to grill' (구워요).