우유부단
優柔不斷 · soft and gentle, unable to cut
Indecisive; can't make up your mind.
When to useSomeone who takes twenty minutes to pick a menu.
Examples
그는 우유부단해서 늘 결정을 미룬다.
He's so indecisive he always puts off decisions.
Korean life dictionary
22 short guides to words and manners