잘난

talented, accomplished

→ 잘나다
adjective Rare #17,273
talented, accomplished Often used before a noun, sometimes sarcastically to mean “arrogant” or “self-important.”
KO: 그는 잘난 사람이라고 생각해요.
EN: He thinks he is an accomplished person.

정말 잘난 민족 이군

What an exceptionally superior people they are.

— 무방비 도시 (1945)

잘난 마누라 ?

A successful wife and two daughters?

— 아모레스 페로스 (2000)

닥쳐, 잘난 놈팡이

Shut up, you smartass

— 어바웃 타임 (2013)

당신이 잘난 게 아니야

It's not that you're better than everyone else.

— 이키루 (1952)

잘난 입 좀 다물어

Shut your smug mouth.

— 마션 (2015)